The surfaces of the springs after shot blasting must be protected from atmospheric influences or the action of aggressive media, the surface of the springs is covered with a special layer that protects it from premature destruction.

There are many types protective coatings... The choice of one or another type of coating depends on the operating conditions of the spring.

Anti-corrosion coatings increase the service life of the springs.

The choice of coverage must be approached with knowledge of the effect different types coverings for elastic elements.

The protective coating must not degrade mechanical properties springs.

In the process of galvanizing, hydrogenation of metals occurs, which sharply reduces plasticity, long-term strength, which leads to the fragility of products.

Hydrogenation of metals can occur both during their manufacture in the process of etching, electroplating and with cathodic polarization. The penetration of hydrogen into the metal leads to changes in parameters crystal lattice, electrochemical and mechanical properties.

When using a zinc coating, a heating operation must be applied in order to dehydrate it.

Main types of coatings

Zinc plating

Electroplating zinc on the surface of the spring in layers from 6 (C6chr.) To 18 (C18Cr.) Microns. The coating has good adhesion and elasticity. It has different shades depending on the passivation.

Chemical phosphating (Chem.Phos)

The most common way to protect an anti-corrosion coating. Used for springs in harsh atmospheric conditions. During the coating process, there is no hydrogenation of the metal, does not require dehydration, there is no risk of spring fragility.

The coating is used before the application of enamel or primer or as an independent coating - with subsequent impregnation with chromopic (Chem.Phos.hr.), Oil (Chem.Phos.prm.)

Chemical oxidation

It is an anti-corrosion coating to protect springs and metal products during long-term storage and when used in adverse atmospheric conditions.

The coating is used before the application of enamel or primer or as an independent coating - with subsequent impregnation with chromopic (Chem.Ox.rep.), Oil (Chem.Ox.prm.).

Cadmium

Electroplating cadmium on the surface of the spring in layers from 6 (Kd6xr.) To 18 (Kd 18xp.) Microns. The coating has good adhesion and elasticity.
It is used in especially harsh operating conditions of springs, it has limited application due to its high toxicity when coating products. It has different shades depending on the passivation.

Requires dehydration to eliminate the risk of hydrogen saturation.

Nickel plating

Nickel plating on the surface of the spring with a layer of 6 to 18 microns. It is used in especially harsh operating conditions of springs. Due to low adhesion to steel, nickel is deposited on a copper substrate to increase decorative properties at the end, a thin (1 micron) layer of chromium (Chem. H24) is applied.

Requires dehydration to eliminate the risk of hydrogen saturation.

Electropolishing

It is an electrochemical process of anodic dissolution of the product surface, placed in a special electrolyte and connected to the positive pole of the current source.

When current passes through the formed circuit, selective dissolution of the treated surface occurs - surface protrusions, which are the tops of roughness, are removed.

Electropolishing evens out the surface, i.e. removes large protrusions (waviness) and gloss it, eliminating roughness (up to 0.01 microns).

It is used as a method of extremely clean finishing or surface finishing to increase its corrosion resistance and improve its appearance.

It is used for heat-resistant and stainless steels type 12Х18Н10Т, ХН77ТЮР.

Paints and varnishes

composite compositions applied to surfaces in liquid or powder form in uniform thin layers and after drying and hardening form a film that has strong adhesion to the base. The formed film is called a paint and varnish coating, the property of which is to protect the surface from external influences (water, corrosion, temperatures, harmful substances), giving it a certain look, color and texture. Required number layers are indicated in the design documentation. Designed mainly for large-sized springs.

Introduction date for newly developed products 01.01.87

for products in production - upon revision technical documentation This standard specifies the designation of metallic and non-metallic inorganic coatings in technical documentation. 1. The designations of the methods for processing the base metal are given in table. 1.

Table 1

	Designation	Base metal processing method	Designation
Cracking	crc	Electrochemical polishing	ep
Punching	shtm	"Snow" etching	snzh
Shading	shtr	Pearl-like finish	f
Vibration rolling	vbr	Drawing arched lines	dl
Diamond processing	alm	Hairline application	ow
Satin	stn	Passivation	Chem. Pass
Matting	mt
Mechanical polishing	mp
Chemical polishing	xn

2. The designations of the methods of obtaining the coating are given in table. 2.

table 2

Coating preparation method	Designation	Coating preparation method	Designation
Cathodic reduction	-	Condensing (vacuum)	Con
Anodic oxidation *	An	Contact	CT
Chemical	Chem	Contact-mechanical	Km
Hot	Mountains	Cathodic sputtering	Cr
Diffusion	Dif	Firing	Vzh
Thermal spraying	According to GOST 9.304-87	Enameling	Em
Thermal decomposition **	Tr	Cladding	PC

* The method of obtaining coatings, colored in the process of anodic oxidation of aluminum and its alloys, magnesium and its alloys, titanium alloys, is designated "Anotsvet". ** The method of obtaining coatings by thermal decomposition of organometallic compounds is designated Mos Tr table 2 3. The material of the coating, consisting of metal, is designated by symbols in the form of one or two letters included in the Russian name of the corresponding metal. The designations of the material of the coating, consisting of metal, are given in table. 3.

Table 3

	Designation	Coating metal name	Designation
Aluminum	A	Palladium	Pd
Bismuth	In and	Platinum	Pl
Tungsten	V	Rhenium	Re
Iron	F	Rhodium	Rd
Gold	Evil	Ruthenium	RU
Indium	Ying	Lead	WITH
Iridium	Ir	Silver	Wed
Cadmium	Cd	Antimony	Su
Cobalt	NS	Titanium	Tee
Copper	M	Chromium	NS
Nickel	N	Zinc	C
Tin	O

4. Designations of nickel and chrome coatings are given in the mandatory appendix 1.5. The coating material, consisting of an alloy, is denoted by the symbols of the components that make up the alloy, separating them with a hyphen, and in parentheses indicate the maximum mass fraction of the first or second (in the case of a three-component alloy) components in the alloy, separating them with a semicolon. For example, a coating with a copper-zinc alloy with a mass fraction of copper of 50-60% and zinc of 40-50% is designated M-Ts (60); Coating with a copper-tin-lead alloy with a mass fraction of copper 70-78%, tin 10-18%, lead 4-20% are designated М-О-С (78; 18). the maximum mass fraction of components, for example, coating with a gold-nickel alloy with a mass fraction of gold 93.0-95.0%, nickel 5.0-7.0% are designated Zl-N (93.0-95.0). Coating with alloys based on precious metals of parts of watches and jewelry, it is allowed to indicate the average mass fraction of components. For newly developed alloys, the designation of components is made in the order of decreasing their mass fraction. 6. Designations of coatings with alloys are given in table. 4.

Table 4

	Designation	Name of the coating material with alloys	Designation
Aluminum-zinc	A-C	Nickel-phosphorus	N-F
Gold Silver	Zl-Wed	Nickel-Cobalt-Tungsten	N-Co-B
Gold-Silver-Copper	Zl-Wed-M	Nickel Cobalt Phosphorus	N-Co-F
Gold-antimony	Zl-Su	Nickel-chromium-iron	H-H-J
Gold-nickel	Zl-N	Tin-bismuth	O-wee
Gold-zinc-nickel	Zl-c-n	Tin-cadmium	O-cd
Gold-copper	Zl-M	Tin-cobalt	Eye
Gold-copper-cadmium	Zl-M-Kd	Tin Nickel	HE
Cobalt gold	Zl-Ko	Tin Lead	O-S
Gold-Nickel-Cobalt	Zl-n-ko	Tin zinc	O-C
Gold-platinum	Zl-Pl	Palladium-Nickel	Pd-N
Indium gold	Zl-In	Silver-copper	Wed-M
Copper-tin (bronze)	M-O	Silver-antimony	Wed-Su
Copper-tin-zinc (brass)	M-O-C	Silver-palladium	Wed-Pd
Copper-zinc (brass)	M-C	Cobalt-tungsten	Ko-B
Copper-lead-tin (bronze)	M-C-O	Cobalt-tungsten-vanadium	Ko-W-Wah
Nickel-boron	N-B	Cobalt-manganese	Ko-Mts
Nickel-tungsten	H-B	Zinc-nickel	C-N
Nickel-iron	H-F	Zinc titanium	Ts-Ti
Nickel-cadmium	N-Kd	Cadmium titanium	Cd-tee
Nickel-cobalt	N-Co	Chromium vanadium	X-Wah
Chromium-carbon	X-Y	Titanium nitride	Ti-Az

Table 4 (Modified edition, Amendment No. 3). 7. In the designation of the coating material obtained by the firing method, indicate the grade of the starting material (paste) in accordance with the normative and technical documentation. 8. In the designation of the hot solder coating, the grade of the solder is indicated according to GOST 21930-76, GOST 21931-76.9. The designations of non-metallic inorganic coatings are given in table. 5.

Table 5

10. If it is necessary to indicate the electrolyte (solution) from which it is required to obtain a coating, use the designations given in the mandatory Appendices 2, 3. Electrolytes (solutions) not specified in the Appendices are designated by their full name, for example, Ts9. ammonium chloride. xp, M15. pyrophosphate. 11. The designations of the functional properties of the coatings are given in table. 6.

Table 6

12. Designations of decorative properties of coatings are given in table. 7.

Table 7

The name of the decorative property	Decorative cover tag	Designation
Shine	Mirrored	zk
	Brilliant	b
	Semi-brilliant	pb
	Matt	m
Roughness	Smooth	ch
	Slightly rough	us
	Rough	NS
	Very rough	lice
Drawing	Figured	rcch
Texture	Crystalline	cr
	Layered	sl
Colour*	-	Color name

* The color of the coating corresponding to the natural color of the deposited metal (zinc, copper, chromium, gold, etc.) does not serve as a basis for classifying the coating as colored. The color of the coating is indicated by its full name, except for the black coating - part 13. The designations for additional coating processing are given in table. eight.

Table 8

Name of additional coating treatment	Designation
Hydrophobization	hfj
Filling in water	nv
Filling in chromate solution	nhr
Application paintwork	paintwork
Oxidation	oks
Reflow	opl
Impregnation (varnish, glue, emulsion, etc.)	prp
Oil impregnation	prm
Heat treatment	T
Toning	tn
Phosphating	phos
Chemical staining, including filling in dye solution	Color name
Chromating *	xp
Electrochemical staining	e-mail Color name

* If necessary, indicate the color of the chromate film: khaki - khaki, colorless - btsv; rainbow film color - no designation. 14. The designation of additional treatment of the coating by impregnation, water repellency, application of paint and varnish coating may be replaced by the designation of the grade of the material used for additional processing. The brand of the material used for additional processing of the coating is designated in accordance with the normative and technical documentation for the material. Designation of a specific paint and varnish coating used as additional processing is carried out in accordance with GOST 9.032-74.15. Production methods, coating material, designation of the electrolyte (solution), properties and color of the coating, additional processing, not listed in this standard, are designated according to the technical documentation or recorded by the full name. (Modified edition, Amendment No. 2). 16. The order of designation of the coating in technical documentation: designation of the method of processing the base metal (if necessary); designation of the method of obtaining the coating; designation of the coating material; minimum coating thickness; designation of the electrolyte (solution) from which the coating is required (if necessary); designation of functional or decorative properties of the coating (if necessary); designation of additional processing (if necessary). The designation of the coating does not necessarily contain all of the listed components. and the thickness of the coating, while the remaining components symbol indicate in the technical requirements of the drawing. (Modified edition, Amendment No. 2). 17. The thickness of the coating, equal to or less than 1 micron, is not indicated in the designation, unless there is a technical need (except for precious metals) .18. Coatings used as technological (for example, zinc for zincate processing of aluminum and its alloys, nickel on corrosion-resistant steel, copper on copper alloys, copper on steel from cyanide electrolyte before acidic copper plating) is allowed not to be indicated in the designation. 19. If the coating is subjected to several types of additional processing, they are indicated in the technological sequence. 20. The coverage designation is recorded in a line. All components of the designation are separated from each other by dots, with the exception of the coating material and thickness, as well as the designation of additional treatment with a paint and varnish coating, which is separated from the designation of a metallic or non-metallic inorganic coating by a fraction. - with lowercase. Examples of recording the designation of coatings are given in Appendix 4. (Modified edition, Amendments No. 1, 2, 3). 21. The order of designation of coatings according to international standards is given in Appendix 5. 21. Introduced additionally (Modified edition, Amendment No. 3).

ANNEX 1

Mandatory

DESIGNATIONS OF NICKEL AND CHROME COATINGS

Coating name	Designation
	abbreviated
Nickel obtained from electrolyte with brightening additives, containing more than 0.04% sulfur	-	NB
Nickel matt or semi-gloss, containing less than 0.05% sulfur; elongation at tensile test not less than 8%	-	Npb
Nickel containing 0.12-0.20% sulfur	-	NS
Nickel double layer (duplex)	Nd	Npb. NB
Nickel three-layer (triplex)	NT	Npb. NS. NB
Nickel two-layer composite - nickel-force *	Nsil	Nb. Ns
Nickel two-layer composite	Ndz	Npb. Ns
Nickel three-layer composite	Ntz	Npb. NS. Ns
Chrome ordinary	-	NS
Chrome porous	-	Xn
Chrome microcracked	-	Hmt
Chrome microporous	-	Hmp
Chrome "milk"	-	Hmol
Chrome double layer	Xd	Khmol. H. tv

* If necessary, the symbol is indicated in the technical requirements of the drawing chemical element or the formula chemical compound used as a deposited substance. Note. It is allowed to use abbreviated designations and indicate the total thickness of the coating. (Modified edition, Amendment No. 2).

APPENDIX 2

Mandatory

DESIGNATIONS OF ELECTROLYTES FOR OBTAINING COATINGS

Base metal	Coating name	Main components	Designation
Aluminum and its alloys	Oxide	Chromic anhydride	chromium
		Oxalic acid, titanium salts	umt
		Boric acid, chromic anhydride	umt
Magnesium and its alloys	Oxide	Ammonium bifluoride or potassium fluoride	fluorine
		Ammonium bifluoride, potassium dichromate or chromic anhydride	fluorine. chromium
		Ammonium bifluoride, sodium dichromate, phosphoric acid	fluorine. chromium. phos

APPENDIX 3

Mandatory

DESIGNATIONS FOR COATING SOLUTIONS

Base metal	Coating name	Main components	Designation
Magnesium and its alloys	Oxide	Potassium dichromate (sodium) with various activators	chromium
		Potassium dichromate (sodium) with various activators, hydrofluoric acid and potassium fluoride (sodium)	chromium. fluorine
Magnesium and its alloys	Oxide	Caustic soda, potassium stannate, sodium acetate, sodium pyrophosphate	mill
Steel, cast iron	Oxide	Ammonium molybdate	mdn
Steel	Phosphate	Barium nitrate, zinc monophosphate, zinc nitrate	oks
Cast iron	Phosphate	Barium nitrate, phosphoric acid, manganese dioxide	oks
Magnesium and its alloys	Phosphate	Barium monophosphate, phosphoric acid, sodium fluoride	fluorine

(Modified edition, Amendment No. 1).

APPENDIX 4

Mandatory

EXAMPLES OF RECORDING COATING SYMBOLS

Coating	Designation
Zinc 6 microns thick with colorless chromating	Ts6. xp. btsv
Zinc, 15 microns thick with khaki chromating	Ts15. xp. khaki
Zinc 9 microns thick with rainbow chromating followed by painting	C9. xr / lkp
Zinc, 6 microns thick, oxidized black	Ts6. Ox. h
Zinc 6 microns thick, phosphated in a solution containing barium nitrate, zinc monophosphate, zinc nitrate, impregnated with oil	Ts6. phos. Ox. prm
Zinc, 15 microns thick, phosphated, hydrophobized	Ts15. phos. hfj
Zinc with a thickness of 6 microns, obtained from an electrolyte in which there are no cyanide salts	Ts6. non-cyanide
Cadmium 3 microns thick, with a nickel sublayer 9 microns thick, with subsequent heat treatment, chromated	H9. Kd3. t. xp
Nickel, 12 microns thick, shiny, obtained on a vibro-rolled surface with subsequent polishing	vbr. H12. b
Nickel, 15 microns thick, shiny, obtained from electrolyte with brightening agent	Nb. 15
Chrome with a thickness of 0.5-1 microns, shiny, with a sublayer of forces - nickel with a thickness of 9 microns	Nsil9. H. b
Chrome with a thickness of 0.5-1 microns, with a sublayer of semi-shiny nickel with a thickness of 12 microns, obtained on a satin-finished surface	stn. Npb12.X
Chrome 0.5-1 microns thick, shiny with a copper sublayer 24 mm thick and two-layer nickel 15 microns thick	M24. Nd15. H. b
Chrome 0.5-1 microns thick, shiny, with a copper sublayer 30 microns thick and three-layer nickel 15 microns thick	M30.Nt15. H. b
Chrome with a thickness of 0.5-1 microns, shiny with a sublayer of a two-layer nickel composite coating with a thickness of 18 microns	Ndz 18. H. b
Chrome two-layer 36 microns thick: "milky" 24 mm thick, solid 12 microns thick	Xd36; Hmol 24. X12. tv
Coating with a tin-lead alloy with a mass fraction of tin 55-60% thick 3 microns, melted	O-C (60) 3. opl.
Coating with a tin-lead alloy with a mass fraction of tin of 35-40% and a thickness of 6 microns, with a nickel sublayer with a thickness of 6 microns	H6. O-S (40) 6
Tin coating 3 microns thick, crystalline, followed by painting	03. cr / lkp
Copper thick 6 microns, shiny, toned in blue color, followed by painting	M6. b. tn. blue / lkp
Plating with a gold-nickel alloy 3 microns thick, with a nickel sublayer 3 microns thick	H3. 3L-N (98.5-99.5) 3
Gold, 1 μm thick, obtained on the surface after diamond cutting	alm. 3L1
Chemical nickel, 9 microns thick, hydrophobized	Chem. H9. gfzh; Chem. H9. gfzh 139-41
Chemical phosphate oil impregnated	Chem. Phos. prm
Chemical phosphate obtained in a solution containing barium nitrate, zinc monophosphate, zinc nitrate	Chem. Phos. oks
Chemical oxide conductive	Chem. Oaks. NS
Chemical oxide obtained in a solution containing sodium hydroxide, potassium stannate, sodium acetate, sodium pyrophosphate, followed by painting	Chem. Oaks. mill / lkp
Chemical oxide obtained in a solution of potassium (sodium) dichromate with various activators	Chem. Oaks. chromium
Chemical oxide obtained in a solution containing ammonium molybdate, impregnated with oil	Chem. Oaks. mdn. prm
Anodic-oxide solid, filled in a solution of chromates	An. Oaks. tv nhr
Anodic-oxide electrical insulating with subsequent application of paint and varnish coating	An. Oaks. eiz / lkp
Anodic oxide solid impregnated with oil	An. Oaks. tv prm; An. Oaks. tv butter 137-02
Anodic oxide obtained on a hatched surface	pcs. An. Oaks
Anodic oxide, obtained colored green in the process of anodic oxidation	Anotsvet. green
Anodic oxide, electrochemically painted dark gray	An. Oaks. e-mail dark grey
Anodic oxide obtained on a chemically polished surface, painted chemically in red	xn. An. Oaks. Red
	An. Oaks. chromium
Anodic oxide obtained in an electrolyte containing chromic anhydride	An. Oaks. chromium
Anodic oxide obtained in an electrolyte containing oxalic acid and titanium salts, solid	An. Oaks. emt. tv
Anodic oxide obtained on a matted surface in an electrolyte containing boric acid, chromic anhydride	mt. An. Oaks. umt
Hot coating obtained from POS 61 solder	Mountains. Pos 61
Silver, 9 microns thick, with a 3 micron chemical nickel sublayer	Chem. H3. Wed9
Coating obtained by chemical passivation, hydrophobized	Chem. Pass. hfj

APPENDIX 5

Reference

IDENTIFICATION OF COATINGS ACCORDING TO INTERNATIONAL STANDARDS

1. The material of the base metal and the coating is denoted by the chemical symbol of the element. The material of the base metal, consisting of an alloy, is denoted by the chemical symbol of the element with the maximum mass fraction. The main non-metallic material is designated NM, the plastic is PL. The coating material, consisting of an alloy, is denoted by the chemical symbols of the components included in the alloy, separated by a hyphen. The maximum mass fraction of the first component is indicated after the chemical symbol of the first component before the hyphen. 2. The designation of the methods for obtaining the coating are given in table. nine.

Table 9

3. Designations of additional coating processing are given in table. ten.

Table 10

* The color of the chromate film means: A - colorless with a bluish tint; B - colorless with a rainbow shade; C - yellow, rainbow; D - olive (khaki) Coatings A and B belong to the 1st class of chromate coatings, the coatings C and D, which have higher corrosion resistance, belong to the 2nd class. 4. The designation of the types of nickel and chrome coatings are given in table. eleven.

Table 11

Coating name	Designation
1. Chrome ordinary
2. Chrome without cracks
3. Chrome microcrack
4. Chrome microporous
5. Nickel shiny
6. Nickel matt or semi-gloss, requiring polishing
7. Nickel matt or semi-gloss, which should not be polished mechanically
8. Nickel two-layer or three-layer

5. The designation is written in a line in the following order: the chemical symbol of the base metal or the designation of the non-metal, followed by a slash; the method of coating, in which the chemical symbol of the metal of the sublayer is indicated; the chemical symbol of the metal of the coating (if necessary, in parentheses indicate the purity of the metal in percent); a figure expressing the minimum thickness of the coating on the working surface in microns; designation of the type of coating (if necessary); designation of additional processing and class (if necessary). Examples of designations are given in table. 12.

Table 12

Coating	Designation	International standard designation
1. Zinc coating for iron or steel 5 microns thick
2. Zinc coating on iron or steel with a thickness of 25 microns with a colorless chromate coating of the 1st class
3. Tin fused coating with a thickness of 5 microns, applied to iron or steel over a nickel sublayer with a thickness of 2.5 microns
4. Silver plating on brass 20 microns thick
5. Gold plating with a gold content of 99.5% on a copper alloy with a thickness of 0.5 microns	Cu / Au (99.5) 0.5
6. Microcracked chrome coating up to 1 micron thick, on shiny nickel 25 microns thick, on plastic	Pl / Ni 25 bCrmc
7. Plating with a tin-lead alloy, with a tin content of 60% and a thickness of 10 microns, melted over iron or steel with a nickel sublayer with a thickness of 5 microns	Fe / Ni5Sn60-Pb10f

Appendix 5 Added additionally (Amendment No. 3).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Academy of the Lithuanian SSRDEVELOPERSE.B. Davidavichus, Cand. chem. sciences; G.V. Kozlova, Cand. tech. sciences (topic leaders); E.B. Romashkene, Cand. chem. sciences; T.I. Berezhnyak; A.I. Volkov, Cand. tech. sciences; T.A. Karmanova2. APPROVED AND INTRODUCED BY Decree State Committee USSR according to standards dated 01.24.85 No. 1643. The term of the first inspection is 1992; inspection frequency - 5 years4. Instead of GOST 9.037-77; GOST 21484-765. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS 6. REPUBLICATION with Amendments No. 1, 2, approved in October 1985, February 1987 (IUS 1-86, 5-87)CHANGE No. 3 approved by the Resolution of the State Standard of Russia dated 05.22.92 No. 498 (IUS 8-92)

• GOST 9466-75 Coated metal electrodes for manual arc welding of steels and surfacing. Classification and general specifications
• GOST 9467-75 Coated metal electrodes for manual arc welding of structural and heat-resistant steels. Types
• GOST 26804-86 Road metal barrier fences. Technical conditions
• GOST 19231.0-83 Reinforced concrete slabs for tramway tracks. Technical conditions
• GOST 21924.0-84 Reinforced concrete slabs for urban road surfaces. Technical conditions
• GOST 21924.1-84 Reinforced concrete prestressed slabs for urban road surfaces. Design and dimensions

Introduction date for newly developed products 01.01.87

for products in production - when revising technical documentation

This standard specifies the designation of metallic and non-metallic inorganic coatings in technical documentation.

1. Designations of the methods of processing the base metal are given in table. 1.

Table 1

	Designation	Base metal processing method	Designation
Cracking	crc	Electrochemical polishing	ep
Punching	shtm	"Snow" etching	snzh
Shading	shtr	Pearl-like finish
Vibration rolling	vbr	Drawing arched lines	dl
Diamond processing	alm	Hairline application	ow
Satin	stn	Passivation	Chem. Pass
Matting	mt
Mechanical polishing	mp
Chemical polishing	xn

2. The designations of the methods of obtaining the coating are given in table. 2.

table 2

Coating preparation method	Designation	Coating preparation method	Designation
Cathodic reduction		Condensing (vacuum)	Con
Anodic oxidation *	An	Contact	CT
Chemical	Chem	Contact-mechanical	Km
Hot	Mountains	Cathodic sputtering	Cr
Diffusion	Dif	Firing	Vzh
Thermal spraying	According to GOST 9.304-87	Enameling	Em
Thermal decomposition **	Tr	Cladding	PC

* The method of obtaining coatings, colored in the process of anodic oxidation of aluminum and its alloys, magnesium and its alloys, titanium alloys, is designated "Anotsvet".

** The method of obtaining coatings by thermal decomposition of organometallic compounds is designated Mos Tr

table 2

3. The coating material, consisting of metal, is designated by symbols in the form of one or two letters included in the Russian name of the corresponding metal.

The designations of the coating material, consisting of metal, are given in table. 3.

Table 3

	Designation	Coating metal name	Designation
Aluminum		Palladium	Pd
Bismuth	In and	Platinum	Pl
Tungsten		Rhenium	Re
Iron		Rhodium	Rd
Gold	Evil	Ruthenium	RU
Indium	Ying	Lead
Iridium	Ir	Silver	Wed
Cadmium	Cd	Antimony	Su
Cobalt	NS	Titanium	Tee
Copper		Chromium
Nickel		Zinc
Tin

4. Designations for nickel and chrome coatings are mandatory.

5. The coating material, consisting of an alloy, is denoted by the symbols of the components that make up the alloy, separating them with a hyphen, and in parentheses indicate the maximum mass fraction of the first or second (in the case of a three-component alloy) components in the alloy, separating them with a semicolon. For example, a coating with a copper-zinc alloy with a mass fraction of copper of 50-60% and zinc of 40-50% is designated M-Ts (60); Coating with a copper-tin-lead alloy with a mass fraction of copper 70-78%, tin 10-18%, lead 4-20% are designated M-O-C (78; 18).

In the designation of the alloy coating material, if necessary, it is allowed to indicate the minimum and maximum mass fraction of the components, for example, coating with a gold-nickel alloy with a mass fraction of gold 93.0-95.0%, nickel 5.0-7.0% denote Zl-N ( 93.0-95.0).

In the designation of the coating with alloys based on precious metals of watch parts and jewelry, it is allowed to indicate the average mass fraction of the components.

For newly developed alloys, the components are designated in the order of decreasing their mass fraction.

6. Designations of coatings with alloys are given in table. 4.

Table 4

	Designation	Name of the coating material with alloys	Designation
Aluminum-zinc	A-C	Nickel-phosphorus	N-F
Gold Silver	Zl-Wed	Nickel-Cobalt-Tungsten	N-Co-B
Gold-Silver-Copper	Zl-Wed-M	Nickel Cobalt Phosphorus	N-Co-F
Gold-antimony	Zl-Su	Nickel-chromium-iron	H-H-J
Gold-nickel	Zl-N	Tin-bismuth	O-wee
Gold-zinc-nickel	Zl-c-n	Tin-cadmium	O-cd
Gold-copper	Zl-M	Tin-cobalt	Eye
Gold-copper-cadmium	Zl-M-Kd	Tin Nickel	HE
Cobalt gold	Zl-Ko	Tin Lead	O-S
Gold-Nickel-Cobalt	Zl-n-ko	Tin zinc	O-C
Gold-platinum	Zl-Pl	Palladium-Nickel	Pd-N
Indium gold	Zl-In	Silver-copper	Wed-M
Copper-tin (bronze)	M-O	Silver-antimony	Wed-Su
Copper-tin-zinc (brass)	M-O-C	Silver-palladium	Wed-Pd
Copper-zinc (brass)	M-C	Cobalt-tungsten	Ko-B
Copper-lead-tin (bronze)	M-C-O	Cobalt-tungsten-vanadium	Ko-W-Wah
Nickel-boron	N-B	Cobalt-manganese	Ko-Mts
Nickel-tungsten	H-B	Zinc-nickel	C-N
Nickel-iron	H-F	Zinc titanium	Ts-Ti
Nickel-cadmium	N-Kd	Cadmium titanium	Cd-tee
Nickel-cobalt	N-Co	Chromium vanadium	X-Wah
Chromium-carbon	X-Y	Titanium nitride	Ti-Az

Table 4 (Modified edition, Amendment No. 3).

7. In the designation of the coating material obtained by the firing method, indicate the grade of the starting material (paste) in accordance with the normative and technical documentation.

8. In the designation of the hot solder coating, indicate the grade of solder in accordance with GOST 21930-76, GOST 21931-76.

9. Designations of non-metallic inorganic coatings are given in table. 5.

Table 5

10. If it is necessary to indicate the electrolyte (solution) from which it is required to obtain a coating, use the designations given in the mandatory annexes.

Electrolytes (solutions) not specified in the appendices are designated by their full name, for example, C9. ammonium chloride. xp, M15. pyrophosphate.

11. Designations of the functional properties of the coatings are given in table. 6.

Table 6

12. Designations of decorative properties of coatings are given in table. 7.

Table 7

The name of the decorative property	Decorative cover tag	Designation
Shine	Mirrored	zk
	Brilliant
	Semi-brilliant	pb
	Matt
Roughness	Smooth	ch
	Slightly rough	us
	Rough
	Very rough	lice
Drawing	Figured	rcch
Texture	Crystalline	cr
	Layered	sl
Colour*		Color name

* The color of the coating corresponding to the natural color of the deposited metal (zinc, copper, chromium, gold, etc.) does not serve as a basis for classifying the coating as colored.

The color of the coating is indicated by the full name, with the exception of the black coating - part.

13. Designations of additional coating processing are given in table. eight.

Table 8

Name of additional coating treatment	Designation
Hydrophobization	hfj
Filling in water	nv
Filling in chromate solution	nhr
Paint coating	paintwork
Oxidation	oks
Reflow	opl
Impregnation (varnish, glue, emulsion, etc.)	prp
Oil impregnation	prm
Heat treatment
Toning	tn
Phosphating	phos
Chemical staining, including filling in dye solution	Color name
Chromating *	xp
Electrochemical staining	e-mail Color name

* If necessary, indicate the color of the chromate film: khaki - khaki, colorless - btsv; rainbow film color - no designation.

14. The designation of additional treatment of the coating by impregnation, hydrophobization, application of paint and varnish coating may be replaced by the designation of the grade of the material used for additional processing.

The grade of the material used for additional treatment of the coating is designated in accordance with the regulatory and technical documentation for the material.

The designation of a specific paint and varnish coating used as an additional treatment is made in accordance with GOST 9.032-74.

15. Methods of obtaining, coating material, designation of electrolyte (solution), properties and color of the coating, additional processing, not listed in this standard, are designated according to the technical documentation or recorded by the full name.

(Modified edition, Amendment No. 2).

16. The order of designation of the coating in the technical documentation:

designation of the method of processing the base metal (if necessary);

designation of the method of obtaining the coating;

designation of the coating material;

minimum coating thickness;

designation of the electrolyte (solution) from which the coating is required (if necessary);

designation of the functional or decorative properties of the coating (if necessary);

designation of additional processing (if necessary).

In the designation of the coating, the presence of all of the listed components is not necessary.

If necessary, in the designation of the coating, it is allowed to indicate the minimum and maximum thickness with a hyphen.

It is allowed to indicate the method of production, material and thickness of the coating in the designation of the coating, while the remaining components of the symbol are indicated in the technical requirements of the drawing.

(Modified edition, Amendment No. 2).

17. The thickness of the coating, equal to or less than 1 micron, is not indicated in the designation unless there is a technical need (except for precious metals).

18. Coatings used as technological (for example, zinc for zincate processing of aluminum and its alloys, nickel on corrosion-resistant steel, copper on copper alloys, copper on steel from cyanide electrolyte before acidic copper plating) may not be indicated in the designation.

19. If the coating is subjected to several types of additional processing, they are indicated in the technological sequence.

20. The designation of the coating is recorded in a line. All components of the designation are separated from each other by dots, with the exception of the coating material and thickness, as well as the designation of additional paintwork, which is separated from the designation of a metallic or non-metallic inorganic coating by a fraction.

The designation of the production method and coating material should be written with a capital letter, the rest of the components - with a lowercase letter.

Examples of recording the designation of coatings are given in.

(Modified edition, Amendments No. 1, 2, 3).

21. The order of designation of coatings according to international standards is given in.

21. Introduced additionally (Modified edition, Amendment No. 3).

ANNEX 1

Mandatory

DESIGNATIONS OF NICKEL AND CHROME COATINGS

Coating name	Designation
	abbreviated	complete
Nickel obtained from electrolyte with brightening additives, containing more than 0.04% sulfur		NB
Nickel matt or semi-gloss, containing less than 0.05% sulfur; elongation at tensile test not less than 8%		Npb
Nickel containing 0.12-0.20% sulfur		NS
Nickel double layer (duplex)	Nd	Npb. NB
Nickel three-layer (triplex)	NT	Npb. NS. NB
Nickel two-layer composite - nickel-force *	Nsil	Nb. Ns
Nickel two-layer composite	Ndz	Npb. Ns
Nickel three-layer composite	Ntz	Npb. NS. Ns
Chrome ordinary
Chrome porous		Xn
Chrome microcracked		Hmt
Chrome microporous		Hmp
Chrome "milk"		Hmol
Chrome double layer	Xd	Khmol. H. tv

* If necessary, the technical requirements of the drawing indicate the symbol of the chemical element or the formula of the chemical compound used as the precipitated substance.

Note ... It is allowed to use abbreviated designations and indicate the total thickness of the coating.

(Modified edition, Amendment No. 2).

APPENDIX 2

Mandatory

DESIGNATIONS OF ELECTROLYTES FOR OBTAINING COATINGS

Base metal	Coating name	Main components	Designation
Aluminum and its alloys	Oxide	Chromic anhydride	chromium
		Oxalic acid, titanium salts	umt
		Boric acid, chromic anhydride	umt
Magnesium and its alloys	Oxide	Ammonium bifluoride or potassium fluoride	fluorine
		Ammonium bifluoride, potassium dichromate or chromic anhydride	fluorine. chromium
		Ammonium bifluoride, sodium dichromate, phosphoric acid	fluorine. chromium. phos

APPENDIX 3

Mandatory

DESIGNATIONS FOR COATING SOLUTIONS

Base metal	Coating name	Main components	Designation
Magnesium and its alloys	Oxide	Potassium dichromate (sodium) with various activators	chromium
		Potassium dichromate (sodium) with various activators, hydrofluoric acid and potassium fluoride (sodium)	chromium. fluorine
Magnesium and its alloys	Oxide	Caustic soda, potassium stannate, sodium acetate, sodium pyrophosphate	mill
Steel, cast iron	Oxide	Ammonium molybdate	mdn
Steel	Phosphate	Barium nitrate, zinc monophosphate, zinc nitrate	oks
Cast iron	Phosphate	Barium nitrate, phosphoric acid, manganese dioxide	oks
Magnesium and its alloys	Phosphate	Barium monophosphate, phosphoric acid, sodium fluoride	fluorine

(Modified edition, Amendment No. 1).

APPENDIX 4

Mandatory

EXAMPLES OF RECORDING COATING SYMBOLS

Coating	Designation
Zinc 6 microns thick with colorless chromating	Ts6. xp. btsv
Zinc, 15 microns thick with khaki chromating	Ts15. xp. khaki
Zinc 9 microns thick with rainbow chromating followed by painting	C9. xr / lkp
Zinc, 6 microns thick, oxidized black	Ts6. Ox. h
Zinc 6 microns thick, phosphated in a solution containing barium nitrate, zinc monophosphate, zinc nitrate, impregnated with oil	Ts6. phos. Ox. prm
Zinc, 15 microns thick, phosphated, hydrophobized	Ts15. phos. hfj
Zinc with a thickness of 6 microns, obtained from an electrolyte in which there are no cyanide salts	Ts6. non-cyanide
Cadmium 3 microns thick, with a nickel sublayer 9 microns thick, with subsequent heat treatment, chromated	H9. Kd3. t. xp
Nickel, 12 microns thick, shiny, obtained on a vibro-rolled surface with subsequent polishing	vbr. H12. b
Nickel, 15 microns thick, shiny, obtained from electrolyte with brightening agent	Nb. 15
Chrome with a thickness of 0.5-1 microns, shiny, with a sublayer of forces - nickel with a thickness of 9 microns	Nsil9. H. b
Chrome with a thickness of 0.5-1 microns, with a sublayer of semi-shiny nickel with a thickness of 12 microns, obtained on a satin-finished surface	stn. Npb12.X
Chrome 0.5-1 microns thick, shiny with a copper sublayer 24 mm thick and two-layer nickel 15 microns thick	M24. Nd15. H. b
Chrome 0.5-1 microns thick, shiny, with a copper sublayer 30 microns thick and three-layer nickel 15 microns thick	M30.Nt15. H. b
Chrome with a thickness of 0.5-1 microns, shiny with a sublayer of a two-layer nickel composite coating with a thickness of 18 microns	Ndz 18. H. b
Chrome two-layer 36 microns thick: "milky" 24 mm thick, solid 12 microns thick	Xd36; Hmol 24. X12. tv
Coating with a tin-lead alloy with a mass fraction of tin 55-60% thick 3 microns, melted	O-C (60) 3. opl.
Coating with a tin-lead alloy with a mass fraction of tin of 35-40% and a thickness of 6 microns, with a nickel sublayer with a thickness of 6 microns	H6. O-S (40) 6
Tin coating 3 microns thick, crystalline, followed by painting	03. cr / lkp
Copper 6 microns thick, shiny, tinted blue, followed by painting	M6. b. tn. blue / lkp
Plating with a gold-nickel alloy 3 microns thick, with a nickel sublayer 3 microns thick	H3. 3L-N (98.5-99.5) 3
Gold, 1 μm thick, obtained on the surface after diamond cutting	alm. 3L1
Chemical nickel, 9 microns thick, hydrophobized	Chem. H9. gfzh; Chem. H9. gfzh 139-41
Chemical phosphate oil impregnated	Chem. Phos. prm
Chemical phosphate obtained in a solution containing barium nitrate, zinc monophosphate, zinc nitrate	Chem. Phos. oks
Chemical oxide conductive	Chem. Oaks. NS
Chemical oxide obtained in a solution containing sodium hydroxide, potassium stannate, sodium acetate, sodium pyrophosphate, followed by painting	Chem. Oaks. mill / lkp
Chemical oxide obtained in a solution of potassium (sodium) dichromate with various activators	Chem. Oaks. chromium
Chemical oxide obtained in a solution containing ammonium molybdate, impregnated with oil	Chem. Oaks. mdn. prm
Anodic-oxide solid, filled in a solution of chromates	An. Oaks. tv nhr
Anodic-oxide electrical insulating with subsequent application of paint and varnish coating	An. Oaks. eiz / lkp
Anodic oxide solid impregnated with oil	An. Oaks. tv prm; An. Oaks. tv butter 137-02
Anodic oxide obtained on a hatched surface	pcs. An. Oaks
Anodic oxide, obtained colored green in the process of anodic oxidation	Anotsvet. green
Anodic oxide, electrochemically painted dark gray	An. Oaks. e-mail dark grey
Anodic oxide obtained on a chemically polished surface, chemically painted red	xn. An. Oaks. Red
	An. Oaks. chromium
Anodic oxide obtained in an electrolyte containing chromic anhydride	An. Oaks. chromium
Anodic oxide, obtained in an electrolyte containing oxalic acid and titanium salts, solid	An. Oaks. emt. tv
Anodic oxide, obtained on a matted surface in an electrolyte containing boric acid, chromic anhydride	mt. An. Oaks. umt
Hot coating obtained from POS 61 solder	Mountains. Pos 61
Silver, 9 microns thick, with a 3 micron chemical nickel sublayer	Chem. H3. Wed9
Coating obtained by chemical passivation, hydrophobized	Chem. Pass. hfj

APPENDIX 5

Reference

IDENTIFICATION OF COATINGS ACCORDING TO INTERNATIONAL STANDARDS

1. The material of the base metal and coating is indicated by the chemical symbol of the element.

The base metal material, consisting of an alloy, is denoted by the chemical symbol for the element with the maximum mass fraction. The main non-metallic material is designated NM, and the plastic is PL.

The coating material, consisting of an alloy, is denoted by the chemical symbols of the components included in the alloy, separated by a hyphen. The maximum mass fraction of the first component is indicated after the chemical symbol of the first component before the hyphen.

2. The designation of the methods of obtaining the coating are given in table. nine.

Table 9

Coating preparation method	Designation
Cathodic reduction
Anodic oxidation
Chemical
Hot
Thermal spraying

3. Designations of additional coating processing are given in table. ten.

Table 10

* The color of the chromate film means:

A - colorless with a bluish tinge; B - colorless with a rainbow shade; C - yellow, rainbow; D - olive (khaki).

Coatings A and B belong to the 1st class of chromate coatings, coatings C and D with higher corrosion resistance belong to the 2nd class.

4. Designation of types of nickel and chrome coatings are given in table. eleven.

Table 11

Coating name	Designation
1. Chrome ordinary
2. Chrome without cracks
3. Chrome microcrack	Crmc
4. Chrome microporous	Crmp
5. Nickel shiny
6. Nickel matt or semi-gloss, requiring polishing
7. Nickel matt or semi-shiny, which should not be mechanically polished
8. Nickel two-layer or three-layer

5. The designation is written in a line in the following order:

the chemical symbol for the base metal or the designation for the non-metal followed by a slash;

a coating method in which the chemical symbol of the metal of the subcoat is indicated;

chemical symbol of the metal of the coating (if necessary, indicate the purity of the metal in percent in parentheses);

a figure expressing the minimum thickness of the coating on the working surface in microns;

designation of the type of coating (if necessary);

designation of additional processing and class (if necessary).

Examples of designations are given in table. 12.

Table 12

Coating	Designation	International standard designation
1. Zinc coating on iron or steel with a thickness of 5 microns	Fe / Zn5	ISO 2081
2. Zinc coating on iron or steel with a thickness of 25 microns with a colorless chromate coating of the 1st class	Fe / Zn25c1A	ISO 4520
3. Tin fused coating with a thickness of 5 microns, applied to iron or steel over a nickel sublayer with a thickness of 2.5 microns	Fe / Ni2.5Sn5F	ISO 2093
4. Silver plating on brass 20 microns thick	Cu / Ag20	ISO 4521
5. Gold plating with a gold content of 99.5% on a copper alloy with a thickness of 0.5 microns	Cu / Au (99.5) 0.5	ISO 4523
6. Microcracked chrome coating up to 1 micron thick, on shiny nickel 25 microns thick, on plastic	Pl / Ni 25 bCrmc	ISO 4525
7. Plating with a tin-lead alloy, with a tin content of 60% and a thickness of 10 microns, melted over iron or steel with a nickel sublayer with a thickness of 5 microns	Fe / Ni5Sn60-Pb10f	ISO 7587

Appendix 5 Added additionally (Amendment No. 3).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Academy of the Lithuanian SSR

DEVELOPERS

E.B. Davidavichus, Cand. chem. sciences; G.V. Kozlova, Cand. tech. sciences (topic leaders); E.B. Romashkene, Cand. chem. sciences; T.I. Berezhnyak; A.I. Volkov, Cand. tech. sciences; T.A. Karmanova

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 01.24.85 No. 164

3. The term of the first inspection is 1992; inspection frequency - 5 years

4. Instead of GOST 9.037-77; GOST 21484-76

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

	Item number
GOST 9.304-87
GOST 21930-76
GOST 21931-76

6. REPUBLICATION with Amendments No. 1, 2, approved in October 1985, February 1987 (IUS 1-86, 5-87)

Modern production knows many ways to improve appearance cast iron and steel products, extend their service life and even form dielectric layers. This can be achieved using a procedure such as chemical oxidation with oiling (chemical ox. Prm.). This service, carried out by the production company "PK Spetsdetal", allows you to create a marketable appearance of many parts - giving them both a noble black color and preventing the occurrence of corrosive processes.

Chemical oxidation by oiling - what is it?

The service is a deliberate process of oxidation of the surface layer metal products in heated solutions of caustic soda with the addition of sodium nitrate or nitrous acid.

Main steps

Sorted parts are dipped in a solution soda ash, caustic soda and trisodium phosphate for chemical degreasing. Then, at a temperature of 90 degrees, they are hot washed. Further, already in cold water parts are cold washed. Next, etching is performed with inhibited hydrochloric acid, which helps to get rid of the formed oil film. Further, the cold washing procedure is repeated and the oxidation procedure is performed. Its essence is that all parts are dipped for 1.5 hours in a mixture of hot concentrated alkaline solution, iron and water. The next steps are the aforementioned cold, hot rinsing, drying. As a result, already dry parts are impregnated with industrial oil.

What are the main advantages of the procedure?

• Long-term operation without corrosion, increased adhesion of adhesives and other paints and varnishes.
• Appearance on details decorative coating deep black without glare. As a result, increased attention to the product and an increased percentage of sales.
• There are no changes in the dimensions of the processed parts - the maximum deviation is 0.6-1.2 microns.
• Quality of execution. The coating applied by PC Spetsdetal does not lose color and integrity even at temperatures above 180 degrees.
• Efficiency of order fulfillment, as well as the general low cost of the procedure. Having processed spare parts once, you can enjoy their flawless work for years.

8. Designation of methods for processing the base metal

Processing method base metal	Designation	Processing method base metal	Designation
Brushing		Chemical polishing
Punching		Electrochemical polishing
Shading
Vibration rolling		"Snow" etching
Diamond processing		Pearl-like finish
Satin		Drawing arched lines	dl
Matting	mt	Hairline application
Mechanical polishing		Passivation

9. Designation of coating methods

Method of obtaining coverings	Designation	Method of obtaining coverings	Designation
Cathodic reduction		Condensing (vacuum)
Anodic oxidation *	An	Contact
Chemical		Contact-mechanical
		Cathodic sputtering
Diffusion		Firing
Thermal spraying	According to GOST 9.304-87	Enameled
Thermal decomposition **		Cladding

* The method of obtaining coatings, colored in the process of anodic oxidation of aluminum and its alloys, magnesium and its alloys, titanium alloys, is designated "Anotsvet".
** The method of obtaining coatings by thermal decomposition of organometallic compounds is designated MosTr.

The coating material, consisting of metal, is designated by symbols in the form of one or two letters included in the Russian name of the corresponding metal (Table 10).

10. Designation of the coating material, consisting of metal

Metal coverings	Designation	Metal coverings	Designation
Aluminum		Palladium
Tungsten

The coating material consisting of an alloy is denoted by the symbols of the components that make up the alloy, separating them with a hyphen, and in parentheses indicate the maximum mass fraction of the first or first and second (in the case of a three-component alloy) components in the alloy, separating them with a semicolon.
Examples of designation: coating with a copper-zinc alloy with a mass fraction of copper 50-60% and zinc 40-50%

Coating with copper-tin-lead alloy with a mass fraction of copper 70-78%, tin 10-18%, lead 4-20%

M-O-C (78; 18).

11. Designation of nickel and chrome coatings

Coating name	Designation
	abbreviated
Nickel obtained brilliant made of electrolyte with gloss forming additives containing more than 0.04% sulfur
Nickel matt or semi-gloss, containing less than 0.05% sulfur; test elongation tensile not less than 8%
Nickel:
two-layer (duplex)
three-layer (triplex)		Npb. NS. NB
two-layer composite - nickel-force *
two-layer composite
three-layer composite		Npb. NS. Ns
Chrome:
porous
microcracked
microporous
"Dairy"
double layer		Khmol. X. tv

If necessary, technical requirements of the drawing indicate the symbol of a chemical element or the formula of a chemical compound used as a co-precipitated substance.
Note. It is allowed to use abbreviated designations and indicate the total thickness of the coating.
In the designation of the coating material with an alloy (Table 12), if necessary, it is allowed to indicate the minimum and maximum mass fractions of the components,
for example, plating with a gold-nickel alloy with a mass fraction of gold 93.0-95.0%, nickel 5.0-7.0%
designate Zl-H (93.0-95.0).
In the designation of the coating with alloys based on precious metals of watch parts and jewelry, it is allowed to indicate the average mass fraction of the components.
For newly developed alloys, the components are designated in the order of decreasing their mass fraction.

12. Designation of coatings with alloys

Name material alloy coating	Designation	Name material alloy coating	Designation
Aluminum-zinc		Gold-copper-cadmium
Gold Silver		Cobalt gold
Gold-Silver-Copper		Gold-Nickel-Cobal
Gold-antimony		Gold-platinum
Gold-nickel		Indium gold
Gold-zinc-nickel		Copper-tin (bronze)
Gold-copper		Copper-tin-zinc (brass)
Copper-zinc (brass)	M-C	Tin Lead	O-S
Copper-lead-tin (bronze)	M-C-O	Tin zinc	O-C
Nickel-boron	N-B	Palladium-Nickel	Pd-N
Nickel-tungsten	H-B	Silver-copper	Wed-M
Nickel-iron	H-F	Silver-antimony	Wed-Su
Nickel-cadmium	N-Kd	Silver-palladium	Wed-Pd
Nickel-cobalt	N-Co	Cobalt-tungsten	Ko-B
Nickel-phosphorus	N-F	Cobalt-tungsten-vanadium	Ko-W-Wah
Nickel-Cobalt-Tungsten	N-Co-B	Cobalt-manganese	Ko-Mts
Nickel Cobalt Phosphorus	N-Co-F	Zinc-nickel	C-N
Nickel-chromium-iron	H-H-J	Zinc titanium	Ts-Ti
Tin-bismuth	O-wee	Cadmium titanium	Cd-tee
Tin-cadmium	O-cd	Chromium vanadium	X-Wah
Tin-cobalt	Eye	Chromium-carbon	X-Y
Tin Nickel	HE	Titanium nitride	Ti-Az

In the designation of the coating material obtained by the firing method, the brand of the starting material (paste) is indicated in accordance with the normative and technical documentation. In the designation of the hot solder coating, the grade of the solder is indicated according to GOST 21930-76, GOST 21931-76.
The designations for non-metallic inorganic coatings are given below:

If it is necessary to indicate the electrolyte (solution) from which the coating is required, use the designations given in the mandatory annexes to GOST 9.306-85.
Electrolytes (solutions) not specified in the annexes are designated by their full name,
for example,

C9. ammonium chloride. xp, M15. pyrophosphate.

13. Designation of the functional properties of coatings.

14. Designation of decorative properties of coatings

* The color of the coating, which corresponds to the natural color of the deposited metal (zinc, copper, chromium, gold, etc.), does not serve as a basis for classifying the coating as colored. The color of the coating is indicated by the full name, with the exception of the black coating -p.

15. Designation of additional coating treatment

Additional coating treatment	Designation
Hydrophobization
Filling in water
Filling in chromate solution
Paint coating
Oxidation
Reflow
Impregnation (varnish, glue, emulsion, etc.)
Oil impregnation
Heat treatment
Toning
Phosphating
Chemical staining, including filling in dye solution	Color name
Chromating *
Electrochemical staining	e-mail Color name

* If necessary, indicate the color of the chromate film:
khaki - khaki, colorless - btsv; rainbow film color - no designation.
The designation of additional treatment of the coating by impregnation, hydrophobization, application of paint and varnish coating may be replaced by the designation of the grade of the material used for additional processing.
The grade of the material used for additional treatment of the coating is designated in accordance with the regulatory and technical documentation for the material.
The designation of a specific paint and varnish coating used as an additional treatment is made in accordance with GOST 9.032-74.
Production methods, coating material, designation of the electrolyte (solution), properties and color of the coating, additional processing that are not listed in the standard are designated according to the technical documentation or recorded by the full name.
The order of designation of the coating in the technical documentation:
designation of the method of processing the base metal (if necessary);
designation of the method of obtaining the coating;
designation of the coating material;
minimum coating thickness;
the designation of the electrolyte (solution) from which it is required to obtain a coating (if necessary) (Table 15 a; 15 b);
designation of the functional or decorative properties of the coating (if necessary);
designation of additional processing (if necessary).

In the designation of the coating, the presence of all of the listed components is not necessary.
If necessary, in the designation of the coating, it is allowed to indicate the minimum and maximum thickness with a hyphen.
It is allowed to indicate the method of production, material and thickness of the coating in the designation of the coating, while the remaining components of the symbol are indicated in the technical requirements of the drawing.
The thickness of the coating, equal to or less than 1 micron, is not indicated in the designation, unless there is a technical need (with the exception of precious metals).

Coatings used as technological
(for example, zinc for zincate processing of aluminum and its alloys, nickel on corrosion-resistant steel, copper on copper alloys, copper on steel from cyanide electrolyte before acidic copper plating) may not be indicated in the designation.
If the coating is subjected to several types of additional processing, they are indicated in the technological sequence.
The coverage designation is recorded in a line. All components of the designation are separated from each other by dots, with the exception of the coating material and thickness, as well as the designation of additional paintwork, which is separated from the designation of a metallic or non-metallic inorganic coating by a fraction.
The designation of the production method and coating material should be written with a capital letter, the rest of the components - with a lowercase letter.
Examples of recording the designation of coatings are given in table. 16.

15a. Designations of electrolytes for obtaining coatings (according to GOST 9.306-85)

Base metal	Coating name	Main components	Designation
Aluminum and its alloys		Chromic anhydride
		Oxalic acid, titanium salts
		Boric acid, chromic anhydride
Magnesium and its alloys		Ammonium bifluoride or potassium fluoride
		Ammonium bifluoride, potassium dichromate or chromic anhydride	fluorine. chromium
		Ammonium bifluoride, sodium dichromate, orthophosphoric acid	fluorine. chromium. phos

15b. Designation of coating solutions

Basic metal	Name coverings	Main components	Designation
Magnesium and its alloys		Potassium dichromate (sodium) with various activators Potassium dichromate (sodium) with various activators, hydrofluoric acid and potassium fluoride (sodium)	chromium. fluorine
Magnesium and its alloys		Caustic soda, potassium stannate, sodium acetate, sodium pyrophosphate
Steel, cast iron		Ammonium molybdate
	Phosphate	Barium nitrate, zinc monophosphate, zinc nitrate
	Phosphate	Barium nitrate, phosphoric acid, manganese dioxide
Magnesium and its alloys	Phosphate	Barium monophosphate, phosphoric acid, sodium fluoride

16. Examples of recording the designations of coatings

Coating	Designation
Zinc 6 microns thick with colorless chromating	Ц6.хр. btsv
Zinc, 15 microns thick with khaki chromating	Ts15. xr.haki
Zinc 9 microns thick with rainbow chromating followed by painting	C9. xr / lkp
Zinc, 6 microns thick, oxidized black
Zinc 6 microns thick, phosphated in a solution containing barium nitrate, zinc monophosphate, zinc nitrate, impregnated with oil	Ts6. phos. Ox. prm
Zinc, 15 microns thick, phosphated, hydrophobized	Ts15. phos. hfj
Zinc with a thickness of 6 microns, obtained from an electrolyte in which there are no cyanide salts	Ts6. non-cyanide
Cadmium 3 microns thick, with a nickel sublayer 9 microns thick, with subsequent heat treatment, chromated	H9. Kd3. t. xp
Nickel 12 microns thick, shiny, obtained on a vibron-rolled surface with subsequent polishing	vbr. H12. b
Nickel, 15 microns thick, shiny, obtained from electrolyte with brightening agent
Chrome with a thickness of 0.5-1 microns, shiny, with a sublayer of forces - nickel with a thickness of 9 microns	Nsil9. H. b
Chrome with a thickness of 0.5-1 microns, with a sublayer of semi-shiny nickel with a thickness of 12 microns, obtained on a satin-finished surface	stn. Npb12. NS
Chrome 0.5-1 microns thick, shiny with a copper sublayer 24 microns thick and two-layer nickel 15 microns thick	M24. Nd. 15. H. b
Chrome 0.5-1 microns thick, shiny, with a copper sublayer 30 microns thick and three-layer nickel 15 microns thick	M30. NT15. H. b
Chrome with a thickness of 0.5-1 microns, shiny with a sublayer of a two-layer nickel composite coating with a thickness of 18 microns
Chrome two-layer 36 microns thick: "milky" 24 microns thick, solid 12 microns thick	Xd36; Khmol24; X12. tv
Coating with a tin-lead alloy with a mass fraction of tin 55-60% thick 3 microns, melted	0-C (60) Z.opl.
Coating with a tin-lead alloy with a mass fraction of tin 35-40% with a thickness of 6 microns, with a nickel sublayer with a thickness of 6 microns
Tin, 3 microns thick, crystalline, followed by painting
Copper 6 microns thick, shiny, tinted and blue, followed by painting	MB. b. tn. blue / lkp
Plating with a gold-nickel alloy 3 microns thick, with a nickel sublayer 3 microns thick	NZ.Zl-N (98.5-99.5) 3
Gold, 1 μm thick, obtained on the surface after diamond cutting
Chemical nickel, 9 microns thick, hydrophobized	Chem. H9. gfzh; Chem. H9. gfzh 139-41
Chemical phosphate oil impregnated	Chem. Phos. prm
Chemical phosphate obtained in a solution containing barium nitrate, zinc monophosphate, zinc nitrate	Chem. Phos. oks
Chemical oxide conductive	Chem. Oaks. NS
Chemical oxide obtained in a solution containing sodium hydroxide, potassium stannate, sodium acetate, sodium pyrophosphate, followed by painting	Chem. Oaks. mill / lkp
Chemical oxide obtained in a solution of potassium (sodium) dichromate with various activators	Chem. Oaks. chromium
Chemical oxide obtained in a solution containing ammonium molybdate, impregnated with oil	Chem. Oaks. mdn. prm
Anodic-oxide solid, filled in a solution of chromates	AN. Oaks. tv nhr
Anodic-oxide electrical insulating with subsequent application of paint and varnish coating	AN. Oaks. eiz / lkp
Anodic oxide solid impregnated with oil	AN. Oke. tv prm; AN. Oaks. tv oil 137-02
Anodic oxide obtained on a hatched surface	pcs. AN. Oaks
Anodic oxide obtained by colored in green color in the process of anodic oxidation	Anotsvet. green
Anodic oxide, electrochemically painted dark gray	AN. Oaks. Email dark grey
Anodic oxide obtained on a chemically polished surface, chemically painted red	xn. AN. Oaks. Red
Anodic oxide obtained in an electrolyte containing chromic anhydride	AN. Oaks. chromium
Anodic oxide, obtained in an electrolyte containing oxalic acid and titanium salts, solid	AN. Oaks. emt. tv
Anodic oxide, obtained on a matted surface in an electrolyte containing boric acid, chromic anhydride	mt. AN. Oaks. umt
Hot coating obtained from POS 61 solder	Mountains. POS61
Silver, 9 microns thick, with a 3 micron chemical nickel sublayer	Chem. H3. Wed9
Coating obtained by chemical passivation, hydrophobized	Chem. Pas.hfzh