page 1

page 2

page 3

p. 4

p. 5

page 6

page 7

page 8

INTERSTATE STANDARD

BELILA ZINC GREEN

TECHNICAL CONDITIONS

IPK PUBLISHING STANDARDS
Moscow

INTERSTATE STANDARD

Date of introduction 01.01.79

This standard applies to thick grated zinc white, which is a thick viscous mass consisting of dry zinc white or their mixture with a filler, rubbed in vegetable oil with the introduction of a desiccant or on natural drying oil.

White is intended for obtaining weather-resistant coatings for metal, wood, plaster, retaining protective properties (in two layers for metal) in a temperate climate for at least 1.5 years, and coatings used indoors.

White is applied to the surface with a brush, roller or by pneumatic spraying.

1. TECHNICAL REQUIREMENTS

1.1. Depending on the composition of the pigment part of the white, the following grades are produced with the corresponding OKP codes indicated in table. 1.

Table 1

1.2. White must be produced in accordance with the requirements of this standard according to the recipe and technological regulations, approved in the prescribed manner.

1.3. Before using, the white is diluted natural drying oil (GOST 7931). Dilution of white linseed oil "oxol" (GOST 190) or combined is allowed, while white is used only for internal work.

1.4. In terms of physical and chemical indicators, thick-grated zinc white must comply with the requirements and standards specified in table. 2.

table 2

Notes:

1. The norm of film hardness according to the pendulum device of the M-3 type was valid until 01.01.95.

2. The norm of film hardness according to the pendulum device of the TML type was not rejection until 01.01.95.

1.3, 1.4.

1.5. (Deleted, Amendment No. 2).

2. RULES OF ACCEPTANCE

(Modified edition, Amendment No. 1).

2.2. The norm for the indicator 4 table. 2 is determined by the manufacturer in every 10th batch.

3. TEST METHODS

3.2. Sample preparation for testing

The test whitewash is thoroughly mixed. The mass fraction of the film-forming substance, solid substance, zinc compounds in terms of ZnO in the solid substance and the degree of grinding are determined without diluting the white.

To determine the rest of the indicators, whitewash is diluted to a paint consistency with natural drying oil in an amount of 17 - 28% of the mass of thickly grated white, filtered through a sieve with a mesh 056N GOST 6613 and applied with a brush to the prepared plates.

Plates for applying white paint are prepared in accordance with GOST 8832, section. 3.

The color of the film and the drying time of white is determined on plates made of steel grades 08 kp and 08 ps with a size of 70 × 150 mm and a thickness of 0.5 - 1.0 mm according to GOST 16523 or on plates of black cold-rolled sheet with a thickness of 0.25 - 0.28 mm according to GOST 13345.

The hardness of the film is determined on glass for photographic plates measuring 9 × 12-1.2 according to TU 6-43-02-05133-03.

To determine the drying time and film hardness, the whitewash is applied in one layer.

The thickness of a single layer coating after drying should be 25 - 30 microns. The film thickness is measured with an MP-25 micrometer in accordance with GOST 4381 or another device with an error of no more than ± 3 microns.

To determine the color, whitewash is applied until the substrate is completely covered.

Drying is carried out at a temperature of (20 ± 2) ° С for 24 hours.

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

3.3. The color of the dried white film is determined by visual comparison with the color of the corresponding control samples colors in natural or artificial daylight diffused light. Compared samples should be in the same plane at a distance of 300 - 500 mm from the observer's eyes at an angle of view that excludes the glitter of the surface. In case of disagreement on color assessment, the final result is taken to determine the color in natural daylight.

(Modified edition, Amendment No. 2).

3.4. Mass fractions of solid and film-forming substances are determined according to GOST 17537. A mixture of acetone (GOST 2768) with ethyl alcohol (GOST 17299) in a ratio of 3: 2. The resulting solid is saved to determine the mass fraction of zinc compounds according to clause 3.5.

3.5. Determination of the mass fraction of zinc compounds in terms of ZnO in solid matter.

3.5.1. Applied reagents and solutions:hydrochloric acid according to GOST 3118;

disodium salt of ethylenediamine-N, N, N "N" -tetraacetic acid, 2-aqueous (Trilon B) according to GOST 10652, solution of concentration c (l / 2C 10 H 14 O 8 N 2 Na 2 2H 2 O) \u003d 0 , 1 mol / dm 3, prepared according to GOST 10398, section. 3 or from the fix channel;

buffer solution is prepared as follows: 20 g of ammonium chloride is dissolved in a small volume of water in a volumetric flask with a capacity of 1 dm 3, add 100 cm 3 of ammonia solution. The volume of the solution in the flask is brought to the mark with distilled water;

eriochrome black T, indicator mixture, prepared in accordance with GOST 10398, section. 1.

3.5.2. Testing

0.5-1.0 g of the solid obtained in clause 3.4 is weighed in a glass with an accuracy of the fourth decimal place, 100-150 cm 3 of distilled water, 15-20 cm 3 of hydrochloric acid are added, heated and boiled for 3 -5 minutes. Upon cooling, the solution is poured into a volumetric flask with a capacity of 250 cm 3 and the volume is brought to the mark with distilled water, a pipette 25 cm 3 of the solution is transferred into a conical flask with a capacity of 250 cm 3, neutralized with ammonia in the presence of red Congo paper, the precipitated white precipitate of zinc hydroxide is dissolved by adding a few drops of ammonia. Add to the solution 25-30 cm 3 of distilled water, 10 cm 3 of a buffer solution at the tip of a spatula of the indicator mixture and titrate with 0.1 mol / dm 3 with a solution of Trilon B until the color changes from red-violet to pure blue.

3.5.3. Processing results

The mass fraction of zinc compounds ( X) as a percentage in terms of ZnO is calculated by the formula

where V- the volume of 0.1 mol / dm 3 solution of Trilon B, consumed for titration, cm 3;

T- titer of 0.1 mol / dm 3 of a solution of Trilon B for metallic zinc (exactly 0.1 mol / dm 3 of a solution of Trilon B corresponds to 0.003269 g of zinc);

1.2447 - coefficient for conversion of zinc mass to ZnO mass;

m -weight of a sample of a solid, g.

The arithmetic mean of two parallel definitions is taken as the result of the determination, the allowable discrepancies between which should not exceed 1%. Record the result to the first decimal place.

3.5.1 - 3.5.3. (Modified edition, Amendment No. 2).

3.6. (Deleted, Amendment No. 2).

4. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

4.4. The method of using thick-grated zinc white is indicated in the appendix.

Sec. 4. (Modified edition, Amendment No. 2).

5. MANUFACTURER'S WARRANTIES

5.1. The manufacturer guarantees the compliance of white with the requirements of this standard, subject to the conditions of transportation and storage.

5.2. The guaranteed shelf life is six months from the date of manufacture.

5.1, 5.2. (Modified edition, Amendment No. 1).

6. SAFETY REQUIREMENTS

6.1. White is a fire hazardous and toxic material due to the properties of the substances that make up them. Lead compounds cause changes in the nervous system, blood, blood vessels.

6.2. The characteristics of the fire hazard and toxicity of the components that make up the white are given in table. 3.

Table 3

6.3. Precautions in the manufacture and use of whitewash: local and general ventilation, provision of shop workers with special clothing and means individual protectionthat meet the requirements of GOST 12.4.011. To protect hands, use “biological gloves” pastes.

6.4. In the production, application and testing of white, the requirements stipulated by the rules of safety and industrial sanitation in accordance with GOST 12.3.005 must be observed.

6.5. Fire extinguishing media: sand, felt, carbon dioxide, water, in a fine spray, chemical or air-mechanical foam from stationary installations or fire extinguishers.

All work related to the manufacture, testing and use of whitewash should be carried out in rooms equipped with supply and exhaust ventilation and fire-fighting equipment.

6.1 - 6.5. (Modified edition, Amendment No. 1).

6.6. In order to protect the atmospheric air from pollution by solvent vapor emissions, constant monitoring of compliance with the maximum permissible emissions (MPE) in accordance with GOST 17.2.3.02 should be organized.

(Introduced additionally, Amendment No. 2).

ATTACHMENT(reference). (Deleted, Amendment No. 1).

ATTACHMENT

Mandatory

METHOD OF APPLICATION OF BELYL ZINC GASTE

Densely grated zinc white is intended for obtaining coatings for metal, wood, plaster, used indoors and in atmospheric conditions.

Before using the whitewash, dilute with natural linseed oil in an amount of 17-28% of the mass of thickly grated white oil. Dilution of white linseed oil "oxol" or combined is allowed, but white is used only for internal work.

The whitewash is applied with a brush, roller or spray gun in an even layer on a dry surface previously cleaned of grease, dirt and old peeling paint in one or two layers. Drying time for each layer at a temperature of (20 ± 2) ° С - 24 hours.

Consumption of whitewash for a single-layer coating is 170-200 g / m2, depending on the brand.

Whitewash is stored in a tightly closed container, protecting it from moisture, heat and direct sunlight.

After the expiration of the guaranteed storage period, the whitewash must be checked for compliance with the requirements of this standard before use.

When carrying out painting works, as well as after their completion, it is necessary to thoroughly ventilate the room. Use rubber gloves to protect your hands.

Keep away from fire.

ATTACHMENT.(Introduced additionally, Rev. № 1).

(Modified edition, Rev. № 2).

The standard applies to thick-grated zinc white, which is a thick viscous mass consisting of dry zinc white or a mixture of them with a filler, rubbed in vegetable oil with the introduction of a desiccant or natural drying oil.

STATE STANDARD OF THE UNION OF SSR

BELYLATIN GREEN

TECHNICAL CONDITIONS

GOST482-77

Moscow

STATE STANDARD OF THE UNION OF SSR

Validity from 01.01.79
until 07/01/96

This standard applies to thick grated zinc white, which is a thick viscous mass consisting of dry zinc white or a mixture of them with a filler, rubbed in vegetable oil with the introduction of a desiccant or on natural drying oil.

White is intended for obtaining weather-resistant coatings for metal, wood, plaster, retaining protective properties (in two layers for metal) in a temperate climate for at least 1.5 years, and coatings used indoors.

White is applied to the surface with a brush, roller or by pneumatic spraying.

(Modified edition, Amendment No. 2).

1. TECHNICAL REQUIREMENTS

1.1. Depending on the composition of the pigment part of the white, the following brands are produced with the corresponding OKP codes indicated in table. ...

Table 1

STATE STANDARD OF THE UNION OF SSR

BELILA ZINC GREEN

TECHNICAL CONDITIONS

GOST482-77

Moscow

STATE STANDARD OF THE UNION OF SSR

Validity from 01.01.79
until 07/01/96

This standard applies to thick grated zinc white, which is a thick viscous mass consisting of dry zinc white or their mixture with a filler, rubbed in vegetable oil with the introduction of a desiccant or on natural drying oil.

White is intended for obtaining weather-resistant coatings for metal, wood, plaster, retaining protective properties (in two layers for metal) in a temperate climate for at least 1.5 years, and coatings used indoors.

White is applied to the surface with a brush, roller or by pneumatic spraying.

(Modified edition, Amendment No. 2).

1. TECHNICAL REQUIREMENTS

1.1. Depending on the composition of the pigment part of the white, the following grades are produced with the corresponding OKP codes indicated in table. ...

Table 1

INTERSTATE STANDARD

BELILA ZINC GREEN

TECHNICAL CONDITIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

INTERSTATE STANDARD

BELILA ZINC GREEN

Technical conditions

Zinc oxide oil paste.

Date of introduction 01.01.79

This standard applies to thick grated zinc white, which is a thick viscous mass consisting of dry zinc white or their mixture with a filler, rubbed in vegetable oil with the introduction of a desiccant or on natural drying oil.

White is intended for obtaining weather-resistant coatings for metal, wood, plaster, retaining protective properties (in two layers for metal) in a temperate climate for at least 1.5 years, and coatings used indoors.

White is applied to the surface with a brush, roller or by pneumatic spraying.

1. TECHNICAL REQUIREMENTS

1.1. Depending on the composition of the pigment part of the white, the following grades are produced with the corresponding OKP codes indicated in table. 1.

Table 1

1.2. White must be produced in accordance with the requirements of this standard according to the recipe and technological regulations, approved in the prescribed manner.

1.3. Before using, the whitewash is diluted with natural drying oil (GOST 7931).

Dilution of white linseed oil "oxol" (GOST 190) or combined is allowed, while

whitewash is used only for internal work.

1.4. In terms of physicochemical indicators, thick-grated zinc white must meet the requirements and standards specified in table. 2.

Official edition ★

Reprinting prohibited

© Publishing house of standards, 1978 © IPK Publishing house of standards, 2002

table 2

Notes:

1. The norm of film hardness according to the pendulum device of the M-3 type was valid until 01.01.95.

2. The norm of film hardness according to the pendulum device of the TML type was not rejection until 01.01.95.

1.3, 1.4. (Modified edition, Amendments No. 1, 2).

1.5. (Deleted, Amendment No. 2).

2. RULES OF ACCEPTANCE

2.1. Acceptance rules - according to GOST 9980.1.

(Modified edition, Amendment No. 1).

2.2. The norm for the indicator 4 table. 2 is determined by the manufacturer in every 10th batch.

3. TEST METHODS

3.1. Sampling - according to GOST 9980.2.

3.2. Sample preparation for testing

The test whitewash is thoroughly mixed. The mass fractions of the film-forming substance, solid substance, zinc compounds in terms of ZnO in the solid substance and the degree of grinding are determined without diluting white.

To determine the remaining indicators, the whitewash is diluted to a paint consistency with natural drying oil in an amount of 17-28% of the mass of thickly grated white, filtered through a sieve with a mesh 056N GOST 6613 and applied with a brush to the prepared plates.

Plates for applying white paint are prepared in accordance with GOST 8832, section. 3.

The color of the film and the drying time of white is determined on plates made of steel grades 08 kp and 08 ps measuring 70 x 150 mm and 0.5-1.0 mm thick in accordance with GOST 16523 or on plates of black cold-rolled sheet with a thickness of 0.25-0.28 mm according to GOST 13345.

The hardness of the film is determined on glass for photographic plates measuring 9 x 12-1.2 according to TU 6-43-02-05133-03.

To determine the drying time and film hardness, the whitewash is applied in one layer.

After drying, the thickness of a single layer coating should be 25-30 microns. The film thickness is measured with an MP-25 micrometer in accordance with GOST 4381 or another device with an error of no more than + 3 microns.

To determine the color, whitewash is applied until the substrate is completely covered.

Drying is carried out at a temperature of (20 + 2) ° C for 24 hours.

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

3.3. The color of the dried white film is determined by visual comparison with the color of the corresponding control color samples under natural or artificial daylight diffused light. The samples to be compared should be in the same plane at a distance of 300-500 mm from the observer's eyes at an angle of view that excludes the glitter of the surface. In case of disagreement on color assessment, the final result is taken to determine the color in natural daylight.

(Modified edition, Amendment No. 2).

3.4. The mass fractions of solid and film-forming substances are determined according to GOST 17537. A mixture of acetone (GOST 2768) with ethyl alcohol (GOST 17299) in a ratio of 3: 2 is used as a solvent. The resulting solid is saved to determine the mass fraction of zinc compounds according to clause 3.5.

3.5. Determination of the mass fraction of zinc compounds in terms of ZnO in solid matter.

3.5.1. Applied reagents and solutions:

hydrochloric acid according to GOST 3118;

ammonia water according to GOST 3760, solution with a mass fraction of 25%;

congo paper red;

distilled water in accordance with GOST 6709;

disodium salt of ethylenediamine-N.N.Y "N" -tetraacetic acid, 2-aqueous (Trilon B) according to GOST 10652, solution of concentration c (l / 2C 10 H 14 O 8 N2Na2-2H2O) \u003d 0.1 mol / dm 3, prepared according to GOST 10398, section. 3 or from the fix channel;

ammonium chloride according to GOST 3773, x. h;

buffer solution is prepared as follows: 20 g of ammonium chloride is dissolved in a small volume of water in a volumetric flask with a capacity of 1 dm 3, add 100 cm 3 of ammonia solution. The volume of the solution in the flask is brought to the mark with distilled water;

eriochrome black T, indicator mixture, prepared according to GOST 10398, section. 1.

3.5.2. Testing

0.5-1.0 g of the solid obtained according to clause 3.4 is weighed in a glass with an accuracy of the fourth decimal place, add 100-150 cm 3 of distilled water, 15-20 cm 3 of hydrochloric acid, heat and boil for 3 -5 minutes. Upon cooling, the solution is poured into a volumetric flask with a capacity of 250 cm 3 and the volume is brought to the mark with distilled water, a pipette 25 cm 3 of the solution is transferred into a conical flask with a capacity of 250 cm 3, neutralized with ammonia in the presence of red Congo paper, the precipitated white precipitate of zinc hydroxide is dissolved by adding a few drops of ammonia. Add to the solution 25-30 cm 3 of distilled water, 10 cm 3 of a buffer solution at the tip of a spatula of the indicator mixture and titrate with 0.1 mol / dm 3 with a solution of Trilon B until the color changes from red-violet to pure blue.

3.5.3. Processing results

The mass fraction of zinc compounds (X) as a percentage in terms of ZnO is calculated by the formula

V ■ T 1.2447- 10- 100

where V is the volume of 0.1 mol / dm 3 of the Trilon B solution, consumed for titration, cm 3;

T- titer of 0.1 mol / dm 3 solution of Trilon B for metallic zinc (exactly 0.1 mol / dm 3 of Trilon B solution corresponds to 0.003269 g of zinc);

1.2447 - coefficient for conversion of zinc mass to ZnO mass;

m is the mass of a sample of a solid, g.

The arithmetic mean of two parallel definitions is taken as the result of the determination, the allowable discrepancies between which should not exceed 1%. Record the result to the first decimal place.

3.5.1-3.5.3. (Modified edition, Amendment No. 2).

3.6. (Deleted, Amendment No. 2).

4. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

4.1. Packing - in accordance with GOST 9980.3.

4.2. Marking - in accordance with GOST 9980.4. When marking a shipping container, a hazard symbol according to GOST 19433 (class 3, classification code 3313) and UN serial number 1263 must be applied.

4.3. Transportation and storage - in accordance with GOST 9980.5.

4.4. The method of application of thick-grated zinc white is indicated in the appendix.

Sec. 4. (Modified edition, Amendment No. 2).

5. MANUFACTURER'S WARRANTIES

5.1. The manufacturer guarantees the compliance of white with the requirements of this standard, subject to the conditions of transportation and storage.

5.2. The guaranteed shelf life is six months from the date of manufacture.

5.1. 5.2. (Modified edition, Amendment No. 1).

6. SAFETY REQUIREMENTS

6.1. White is a fire hazardous and toxic material due to the properties of the substances that make up them. Lead compounds cause changes in the nervous system, blood, blood vessels.

6.2. The characteristics of the fire hazard and toxicity of the components that make up the white are given in table. 3.

Table 3

6.3. Precautions in the manufacture and use of white: local and general ventilation, provision of shop workers with special clothing and personal protective equipment that meet the requirements of GOST 12.4.011. To protect hands, use “biological gloves” pastes.

6.4. During the production, application and testing of white, the requirements stipulated by the rules of safety and industrial sanitation in accordance with GOST 12.3.005 must be observed.

6.5. Fire extinguishing media: sand, felt, carbon dioxide, water, in a fine spray, chemical or air-mechanical foam from stationary installations or fire extinguishers.

All work related to the manufacture, testing and use of whitewash should be carried out in rooms equipped with supply and exhaust ventilation and fire-fighting equipment.

6.1-6.5. (Modified edition, Amendment No. 1).

6.6. In order to protect atmospheric air from pollution by solvent vapors, constant monitoring of compliance with maximum permissible emissions (MPE) in accordance with GOST 17.2.3.02 should be organized.

(Introduced additionally, Amendment No. 2).

APPENDIX (reference). (Deleted, Amendment No. 1).

ATTACHMENT

Mandatory

METHOD OF APPLICATION OF BELYL ZINC GREEN

Densely grated zinc white is intended for obtaining coatings on metal, wood, plaster, used indoors and in atmospheric conditions.

Before using the whitewash, dilute with natural linseed oil in an amount of 17-28% of the mass of thickly grated white oil. Dilution of white linseed oil "oxol" or combined is allowed, but white is used only for internal work.

The whitewash is applied with a brush, roller or spray gun in an even layer on a dry surface previously cleaned of grease, dirt and old peeling paint in one or two layers. Drying time for each layer at a temperature of (20 ± 2) ° С - 24 hours.

Consumption of whitewash for a single-layer coating is 170-200 g / m 3, depending on the brand.

Whitewash is stored in a tightly closed container, protecting it from moisture, heat and direct sunlight.

After the expiration of the guaranteed storage period, the whitewash must be checked for compliance with the requirements of this standard before use.

When carrying out painting works, as well as after their completion, it is necessary to thoroughly ventilate the room. Use rubber gloves to protect your hands.

Keep away from fire.

ATTACHMENT. (Introduced additionally, Amendment No. 1).

(Modified edition, Amendment No. 2).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Chemical Industry

2. APPROVED AND INTRODUCED INTO EFFECT by the Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated 16.09.77 No. 2234

3. REPLACE GOST 482-67

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

5. The limitation of the period of validity was removed according to the protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94)

6. EDITION (May 2002) with Amendments No. 1, 2, approved in January 1985, September 1990 (IUS 4-85, 12-90)

Editor L. V. Koretnikova Technical editor N. S. Grishanova Proofreader V. I. Barentseva Computer layout I.А. Naleykina

Ed. persons. No. 02354 dated 14.07.2000. Put in the set 07.06.2002. Signed for printing on 01.07.2002. Uel. print l. 0.93. Academic and Publishing House 0.65.

Circulation 109 copies. From 6285. Zak. 553.

IPK Standards Publishing House, 107076 Moscow, Kolodezny per., 14. e-mail: Typeset in the Publishing House on a PC

Branch IPK Publishing house of standards - type. "Moscow printer", 103062 Moscow, Lyalin per., 6.

Application (reference). Deleted Application (required). Method of using white zinc thick grated

Interstate standard GOST 482-77
"White zinc thick grated. Specifications"
(approved by the resolution of the State Committee of Standards of the Council of Ministers of the USSR dated September 16, 1977 N 2234)

Zinc oxide oil paste. Specifications

Instead of GOST 482-67

This standard applies to thick grated zinc white, which is a thick viscous mass consisting of dry zinc white or their mixture with a filler, rubbed in vegetable oil with the introduction of a desiccant or on natural drying oil.

White is intended for obtaining weather-resistant coatings for metal, wood, plaster, retaining protective properties (in two layers for metal) in a temperate climate for at least 1.5 years, and coatings used indoors.

White is applied to the surface with a brush, roller or by pneumatic spraying.

1. Technical requirements

1.1. Depending on the composition of the pigment part of the white, the following grades are produced with the corresponding OKP codes indicated in table. 1 .

Table 1

(Modified edition, Amendment N 1).

1.2. White must be produced in accordance with the requirements of this standard according to the recipe and technological regulations, approved in the prescribed manner.

1.3. Before using, the whitewash is diluted with natural drying oil (GOST 7931).

Dilution of white linseed oil "oxol" (GOST 190) or combined is allowed, while white is used only for internal work.

1.4. In terms of physicochemical indicators, thick-grated zinc white must meet the requirements and standards specified in table. 2.

table 2

Notes:

1. The norm of film hardness according to the pendulum device of the M-3 type was valid until 01.01.95.

2. The norm of film hardness according to the pendulum device of the TML type was not rejection until 01.01.95.

1.3, 1.4. (Modified edition, Rev. N 1, 2).

1.5. (Deleted, Rev. N 2).

3. Test methods

3.1. Sampling - according to GOST 9980.2.

3.2. Sample preparation for testing

The test whitewash is thoroughly mixed. The mass fractions of the film-forming substance, solid substance, zinc compounds in terms of ZnO in the solid substance and the degree of grinding are determined without diluting white.

To determine the remaining indicators, the whitewash is diluted to a paint consistency with natural drying oil in an amount of 17-28% of the mass of thickly grated white, filtered through a sieve with a mesh 056N GOST 6613 and applied with a brush to the prepared plates.

Plates for applying white paint are prepared in accordance with GOST 8832, section. 3.

The color of the film and the drying time of white is determined on plates made of steel grades 08 kp and 08 ps with a size of 70x150 mm and a thickness of 0.5-1.0 mm according to GOST 16523 or on plates of black cold-rolled sheet with a thickness of 0.25-0.28 mm according to GOST 13345.

The hardness of the film is determined on glass for photographic plates measuring 9 x 12 - 1.2 according to TU 6-43-02-05133-03.

To determine the drying time and film hardness, the whitewash is applied in one layer.

After drying, the thickness of a single layer coating should be 25-30 microns. The film thickness is measured with an MP-25 micrometer in accordance with GOST 4381 or another device with an error of no more than microns.

To determine the color, whitewash is applied until the substrate is completely covered.

Drying is carried out at a temperature for 24 hours.

(Modified edition, Rev. N 1, 2).

3.3. The color of the dried white film is determined by visual comparison with the color of the corresponding control color samples under natural or artificial daylight diffused light. The samples to be compared should be in the same plane at a distance of 300-500 mm from the observer's eyes at an angle of view that excludes the glitter of the surface. In case of disagreement on color assessment, the final result is taken to determine the color in natural daylight.

(Modified edition, Amendment N 2).

3.4. Mass fractions of solid and film-forming substances are determined according to GOST 17537. A mixture of acetone (GOST 2768) with ethyl alcohol (GOST 17299) in a ratio of 3: 2 is used as a solvent. The resulting solid is saved to determine the mass fraction of zinc compounds according to clause 3.5.

3.5. Determination of the mass fraction of zinc compounds in terms of ZnO in solid matter.

3.5.1. Applied reagents and solutions:

ammonia water according to GOST 3760, solution with a mass fraction of 25%;

congo paper red;

disodium salt of ethylenediamine-N, N, N ", N" -tetraacetic acid, 2-aqueous (Trilon B) according to GOST 10652, solution concentration \u003d 0.1, prepared according to GOST 10398, section. 3 or from the fix channel;

ammonium chloride according to GOST 3773, x. h;

buffer solution, prepared as follows: 20 g of ammonium chloride is dissolved in a small volume of water in a volumetric flask with a capacity of 1, add 100 ammonia solution. The volume of the solution in the flask is brought to the mark with distilled water;

eriochrome black T, indicator mixture, prepared according to GOST 10398, section. 1 .

3.5.2. Testing

0.5-1.0 g of the solid obtained according to clause 3.4 is weighed in a glass with an accuracy of the fourth decimal place, 100-150 distilled water, 15-20 hydrochloric acid are added, heated and boiled for 3-5 minutes. Upon cooling, the solution is poured into a volumetric flask with a capacity of 250 and the volume is brought to the mark with distilled water, the solution is pipetted into a conical flask with a capacity of 250, neutralized with ammonia in the presence of red Congo paper, the precipitated white precipitate of zinc hydroxide is dissolved by adding a few drops of ammonia. Add to the solution 25-30 distilled water, 10 buffer solution at the tip of the indicator mixture spatula and titrate with 0.1 Trilon B solution until the color changes from red-violet to pure blue.

3.5.3. Processing results

The mass fraction of zinc compounds (X) as a percentage in terms of ZnO is calculated by the formula

where V is the volume of 0.1 solution of Trilon B, consumed for titration,;

T is the titer of 0.1 Trilon B solution for metallic zinc (exactly 0.1 Trilon B solution corresponds to 0.003269 g of zinc);

1.2447 - coefficient for conversion of zinc mass to ZnO mass;

m is the mass of a sample of a solid, g.

The arithmetic mean of two parallel definitions is taken as the result of the determination, the allowable discrepancies between which should not exceed 1%. Record the result to the first decimal place.

3.5.1-3.5.3. (Modified edition, Amendment N 2).

3.6. (Deleted, Rev. N 2).

4. Packaging, labeling, transportation and storage

Table 3