GOST 24709-81

TU 38.401-67-108-92

TU 6-43-0205133-03-91

5. The limitation of the period of validity was removed by the Decree of the State Standard of the USSR of September 30, 1991 N 1577

6. REPUBLICATION (August 1993) with Amendments No. 1, 2, approved in November 1986, September 1991 (IUS 2-87, 12-91)


This standard applies to EP-140 enamels, which are a suspension of pigments and fillers in solution epoxy resin in a mixture of organic solvents with the addition of a hardener.

Enamels are intended for painting pre-primed surfaces made of steel, magnesium, aluminum and titanium alloys, as well as copper and its alloys.

Enamels EP-140 are intended for coloring products operated under B2 conditions in accordance with GOST 9.104-79.

The requirements of the introductory part, section 1 (clauses 1.1-1.6, 1.7 - in part of clauses 1-9 of Table 2), sections 2-6 of the standard are mandatory, the requirements of clause 1.7 in terms of clauses 10-13 of Table. 2 - recommended.

1. TECHNICAL REQUIREMENTS

1. TECHNICAL REQUIREMENTS

1.1. Enamels EP-140 must be manufactured in accordance with the requirements of this standard for the recipe and technological regulations approved in the prescribed manner.

1.2. Enamels are applied by pneumatic spraying, pouring or brushing.

1.3. EP-140 enamels must be made following colors, with the corresponding OKP codes indicated in Table 1.

Table 1

Correspondence of the color names of EP-140 enamels according to GOST 24709-81 and GOST 24709-81 with change No. 1 is given in the reference appendix.

1.4. Enamels of all colors, except for silver, are supplied as a set in the form of two components: a semi-finished enamel of the corresponding color and hardener No. 2.



The components are mixed by the consumer immediately before use, while for enamels of yellow, dark red, protective and black colors it is taken for 70 parts of the semi-finished enamel product 30 parts of hardener N 2 by weight, for other colors - for 75 parts of the semi-finished enamel 25 parts of hardener N 2 by weight. mass.

1.5. Enamel EP-140 silver color supplied as a set in the form of three components: semi-finished enamel, hardener N 4 and aluminum powder grade PAP-2 (GOST 5494-71).

By agreement with the consumer, it is allowed to supply a semi-finished product of EP-140 enamel without a hardener.

The components are mixed by the consumer immediately before use, while 30 parts of hardener N 4 and 11 parts of aluminum powder by weight are taken for 70 parts of the semi-finished enamel.

1.6. Dilution of EP-140 enamels to a working viscosity of 12-14 s according to a VZ-246 type viscometer with a nozzle diameter of 4 mm (or VZ-4) at an enamel temperature of (20.0 ± 0.5) ° C is carried out with a R-5A grade solvent ( GOST 7827-74) or a mixture of solvents consisting of acetone (GOST 2768-84), ethyl cellosolve (GOST 8313-88) and xylene (GOST 9949-76, GOST 9410-78), taken by weight 30:30:40, respectively.

1.7. EP-140 enamels must comply with the requirements and standards specified in Table 2.

table 2

Notes:

1. It is allowed to increase the standard viscosity of the semi-finished enamel product during storage (by no more than 20%) if the enamel diluted to the working viscosity meets the requirements of this standard.

2. The standard for the indicator "Mass fraction of non-volatile substances in the semi-finished enamel" is not rejected until 01.01.94. The definition is required.

3. The standard for the indicator "Hardness of the coating according to the pendulum device type TML (pendulum A)" is not defective until 01.01.94. The definition is required.

4. The standard for the indicator "Hardness of the coating according to the pendulum device type M-3" is valid until 01.01.94.

5. The norm in terms of "Hiding power" is not rejected until 01.01.94. The definition is required.

1.4-1.7. (Changed edition, Rev. N 2).

2. SAFETY REQUIREMENTS

2.1. Enamel EP-140 is a toxic and flammable material, due to the properties of the solvents included in its composition and used for dilution, as well as the properties of hardeners N 2 and N 4 used for its curing (table 3).

Table 3

2.2. Epoxy resin, which is part of the semi-finished enamel, can cause skin diseases.

Solvent vapors are irritating to the mucous membranes of the eyes and upper respiratory tract, and can cause dizziness and headaches.

2.3. In the production and use of EP-140 enamels, the requirements of the rules of sanitary and fire safety according to GOST 12.3.005-75.

2.4. All work related to the manufacture and use of enamels should be carried out in workshops equipped with supply and exhaust ventilation and fire fighting equipment in accordance with GOST 12.1.005-88.

2.5. Persons associated with the manufacture and use of EP-140 enamels must be provided with the means personal protection(special clothing, goggles, apron, rubber gloves, protective ointments and pastes) that meet the requirements of GOST 12.4.011-89.

2.6. The production of EP-140 enamels must comply with general rules explosion safety for explosion and fire hazardous, chemical, petrochemical and oil refining industries, approved by the USSR Gosgortekhnadzor on 09/06/88.

2.7. Fire extinguishing media: sand, felt mat, OP and OU fire extinguishers, chemical or air-mechanical foam from stationary installations.

2.8. Control over compliance with maximum allowable emissions (MAE) is carried out in accordance with GOST 17.2.3.02-78. Waste disposal is carried out in accordance with sanitary regulations the procedure for the accumulation, transportation, neutralization and disposal of toxic industrial waste.

3. ACCEPTANCE

3.1. Acceptance rules - according to GOST 9980.1-86.

3.2. The need for testing according to the recommended indicators of Table 2 (clauses 10, 11, 12, 13) is established by the manufacturer and consumer when concluding a contract for the supply of products.

3.3. Every hundredth batch is subjected to periodic tests for compliance with all the requirements and norms of this standard.

3.4. Upon receipt of unsatisfactory results of periodic tests, the manufacturer checks each lot until satisfactory test results are obtained in a row in at least three lots.

Section 2, 3. (Changed edition, Rev. N 2).

4. TEST METHODS

4.1. Sampling - according to GOST 9980.2-86.

4.2. Preparing for the test

Conditional viscosity, mass fraction of non-volatile substances and the degree of grinding are determined in the enamel semi-finished product.

To determine the remaining indicators, the enamel is prepared by thoroughly mixing the semi-finished enamel of the corresponding color with the components specified in paragraphs 1.4 or 1.5, diluted to the working viscosity according to paragraph 1.6 and applied with a paint sprayer on plates prepared in accordance with GOST 8832-76, section 3.

Before application, the finished enamel is kept in a closed container for 30 minutes.

Colour, appearance coatings, time and degree of drying, elasticity of the coating in bending, resistance to static effects of water, oil and gasoline (nefras) are determined on plates of black tin (GOST 13345-85) 20x150 mm in size (when determining elasticity in bending) and 70x150 mm ( when determining other indicators) with a thickness of 0.25-0.32 mm.

Enamel hiding power and coating hardness are determined on glass for photographic plates 9x12-1.2 in size (TU 6-43-0205133-03-91).

The impact strength of the coating and heat resistance are determined on plates made of steel grades 08 kp or 08 ps (GOST 16523-89) with a size of 70x150 mm and a thickness of 0.8-1.0 mm.

To determine the color, appearance and hiding power, the enamel is applied until the surface to be painted is completely covered.

To determine the time and degree of drying, hardness, bending elasticity, resistance of the coating to the static effect of water, oil, gasoline (nefras), the enamel is applied in one layer.

To determine the impact strength of the coating and heat resistance, the enamel is applied in two layers.

Before hot drying, the plates are kept at a temperature of (20 ± 2) ° C for 30 minutes.

The single-layer coating is dried at a temperature of (90 ± 2) °C for 2 hours. The thickness of the single-layer coating should be 20-25 microns.

With a two-layer coating, each layer is dried at a temperature of (90 ± 2) ° C for 2 hours. The thickness of the two-layer coating should be 40-50 microns.

4.1, 4.2. (Changed edition, Rev. N 2).

4.3. The color and appearance of the dried enamel film is determined visually in diffused daylight.

Control of the color of the enamel film is carried out by comparing the color sample prepared for testing with the corresponding samples of the card file of standards or with approved samples of the color of EP-140 enamel.

(Changed edition, Rev. N 1).

4.For. (Deleted, Rev. N 2).

4.4. The mass fraction of non-volatile substances is determined according to GOST 17537-72. Drying of a sample weighing (2.0 ± 0.2) g is carried out in drying cabinet at a temperature of (100±2) °C for 2 hours.

(Changed edition, Rev. N 2).

4.5. (Excluded, Rev. N 1).

4.6. The resistance of the film to the static effect of water is determined according to GOST 9.403-80.

Before inspection, the samples are kept in air for 2 hours at a temperature of (20 ± 2) °C.

The film should be unchanged.

(Changed edition, Rev. N 1).

4.7. The resistance of the film to the static effect of oil and gasoline (non-fras) is determined according to GOST 9.403-80 (Changed edition, Amendment N 2).

4.8. To determine the heat resistance of silver EP-140 enamel, the plates with the dried film are placed in a thermostat at a temperature of (85 ± 5) °С and the temperature is gradually increased to (250 ± 5) °С.

After holding at (250 ± 5) °C for 3 hours, the plates are removed, cooled to a temperature of (20 ± 2) °C and visual inspection is carried out.

The film should be unchanged. Color change is allowed.

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

4.9. Determining the shelf life of enamel

Hardener N 2 or N 4 is added to 100 g of semi-finished enamel according to paragraphs 1.4 or 1.5 and thoroughly mixed until a homogeneous mass is obtained. Then the enamel is diluted to a viscosity of 12-14 s in accordance with clause 1.6 and left in a jar with a tightly closed lid for 6 hours at a temperature of (20±2) °C. After the specified time, the enamel is again thoroughly mixed and the viscosity, color and appearance of the film are checked.).

6. MANUFACTURER WARRANTY

6.1. The manufacturer guarantees the compliance of EP-140 enamels with the requirements of this standard, subject to the conditions of transportation and storage.

6.2. Guarantee period storage of semi-finished enamel - 12 months from the date of manufacture.

Sections 5, 6. (Changed edition, Rev. N 2).

APPENDIX (reference). Correspondence table for the color names of EP-140 enamels

APPENDIX
Reference

Appendix. (Introduced additionally, Rev. N 1).



The text of the document is verified by:
official publication
M.: Publishing house of standards, 1993

ALFA

ENAMEL EP-140

GOST 24709-81

Application area: Enamel EP-140 Designed for painting pre-primed surfaces of steel, magnesium, aluminum and titanium alloys, as well as copper and its alloys.

Enamel EP-140 allowed for use in the aircraft industry.

Peculiarities:

enamel coating EP-140 has high anti-corrosion properties, weather resistance, resistance to water, mineral oils, gasolines, detergents. The silvery enamel film has increased heat resistance at a temperature of (250 + 5) 0 C.

It is allowed to apply on the surface of products made of phenolic, acrylic, polystyrene, epoxy and some other plastics.

Main characteristics:

Enamel EP-140 two-pack, based on epoxy resins. Three-pack silver enamel: base, hardener and aluminum powder PAP-2.

Color: white, black, silver, etc.

Appearance of a covering: homogeneous, semi-glossy.

Application methods: brush, roller or pneumatic spray.

Enamel pot life at 20 0 С not less than: 6 hours.

Drying time to st.3: at 20 0 C no more than 6 hours,

At 90 0 С no more than 1 hour.

Enamel consumption per layer: 50 - 100 g/m 2 .

Thickness of one layer: 20 - 25 microns.

Guaranteed shelf life: 12 months from the date of manufacture.

Surface preparation:

Clean the metal surface in the presence of rust and scale by abrasive blasting to a degree of at least 2 according to GOST 9.402 or Sa 2 1/2 according to ISO 8501.

The prepared surface is primed with primers VL-023, VL-02, EP-0263S, AK-070, EP-076 or EP-0199.

Application conditions:

Before applying the enamel base EP-140 mix well until smooth. To prepare the composition, mix the hardener with the base in the ratio indicated in the quality document for each batch of material, and mix thoroughly for at least 10 minutes. The prepared enamel is applied to the surface of the protected metal at an ambient temperature of 10 0 C to 30 0 C and relative humidity air is not higher than 80%.

Enamel dilutions EP-140 before application, as a rule, is not required.

After one layer has dried (4-6 hours at 20 0 C), subsequent layers of enamel are applied similarly.

To thin the enamel EP-140 you can use solvents P-5A or a mixture of solvents consisting of acetone, ethyl cellosolve and xylene taken by weight 30:30:40, respectively. For washing tools - xylene, 646, 647, 648, R-4, R-5.

Precautionary measures:

The material is flammable! Store enamel indoors, avoiding direct contact with it. sun rays and moisture at a temperature not exceeding 30 0 С.

Enamel EP-140

Surely everyone knows what corrosion is. Let's turn to Wikipedia, where we learn that corrosion is the spontaneous destruction of metals. This is a process that occurs due to the interaction of metals with factors environment But you may be surprised to learn that there are several types of corrosion! Without going into details, let's say right away that rust is the most common type of this process. In other words, corrosion is natural process: just like, for example, the life of animals, plants, and also human life is not eternal.

Unfortunately, it is not always possible to prolong the life of living organisms. But on the other hand, it is quite possible to extend the service life of objects and products, including metal. As you may have guessed, this can be done with the help of paints and varnishes.

The chemical industry has created materials with special properties: weatherproof, thermal and electrical insulating and, of course, anti-corrosion. As the name implies, the task of such materials is to protect the surface as much as possible from the effects of adverse environmental factors.

Enamel EP-140 stands out among such materials.

brief information about the application

This enamel is predominantly industrial use and is used outdoors. Enamel is designed to protect aluminum, magnesium, titanium, copper, steel surfaces, as well as alloys.

Detailed information about the appointment of EP-140

As a rule, enamel works in areas where protection metal surfaces really badly needed: shipbuilding (painting port equipment, as well as small boats), aircraft industry (painting of aircraft elements), railway transport and agricultural machinery. Enamel EP-140 is successfully applied to industrial equipment.

Buy enamel ep-140 at favorable price you can with us.

Main properties and characteristics

Enamel is available in several colors, but in order to get a silver tint, you must additionally purchase PAP-1 or PAP-2 powder and add it when mixing the components.

It distinguishes:

• high strength and hardness of enamel ep-140;
• resistance to water, industrial oils, gasoline;
• silver enamel coating - heat-resistant, withstands temperatures up to 250C.

What is good about this enamel? EP-140 forms a hard coating, which makes the surface resistant to the effects of various climatic zones, water, precipitation, chemical substances, oil products, gases, vapors, oils. Enamel also withstands impact high temperatures(up to 250С). All this is achieved by the presence of a hardener, which is added when preparing the enamel for application. To enhance the effect of the enamel, we recommend pre-priming the surface.

Appearance

After drying, EP-140 enamel forms a uniform, smooth surface without foreign inclusions, a small shagreen is allowed. Some enamels (dark red, yellow, blue, dark brown and black) are allowed to have minor pockmarks and a small rash. The enamel forms a class II semi-gloss finish.

Available colors

Dark red, orange, yellow, ivory, dark green, blue, sky blue, light gray 500, light gray 583, dark brown, protective, light protective, tobacco, light tobacco, dark gray, gray , bluish gray, silver, black, white.

Application

However, first of all, we will tell you how to prepare the surface. At the first stage, it is necessary to clean it, remove traces of the old coating, degrease and prime. Then determine whether the enamel should be thinned - in case it has thickened. To do this, you will need R-5 solvent. Do not forget to add the hardener that comes with the enamel to the enamel and mix the composition. To obtain a silvery tint, add aluminum powder. The composition can be applied with a brush, roller, and also by pneumatic spraying. It is desirable to apply at least 2 layers of enamel - for each of them you will need 70-90 grams per 1 square meter. The drying time of one layer is approximately 5-6 hours. If it is possible to dry the surface by hot drying (at 90°C), the drying time can be reduced to 2 hours.

When working with enamel, remember that it is toxic and flammable. Be sure to use personal protection methods - gloves, a respirator, and when applying by spraying - a protective suit.

Specifications

Metal: primer AK-070, EP-09T, EP-076, EP-057, EP-0156, AK-069, VL-02 (with aluminum powder), VL-023 (with aluminum powder) or similar - 1 layer + enamel EP-140 - 2 layers. The primer should be chosen depending on the surface to be painted and climatic conditions coating operation. Ferrous metal without priming - 2 layers of EP-140 enamel.

Container and packaging

Semi-finished enamel EP-140 is produced in industrial packaging (drums 25 kg, flasks 15 kg, barrels 57 kg);

Storage conditions

Enamel can be stored for 1 year from the date of manufacture - in a dark, cool, dry place, away from electrical appliances and sunlight.

STATE STANDARD

UNION SSR

ENAMEL EP-140

The enamel semi-finished product is packed in black tin cans (GOST 6128-81) or FS steel flasks (GOST 5799-78).

A hazard sign (class 3), classification code 3212 (GOST 19433-88) and a handling sign "Keep away from heat" (GOST 14192-77) must be applied to the shipping container. Serial number UN 1263.

5 3. Transportation and storage - in accordance with GOST 9980.5-86.

The semi-finished product of enamel should be stored at a temperature not exceeding 30 °C.

6. MANUFACTURER WARRANTY

6.1. The manufacturer guarantees the compliance of EP-140 enamels with the requirements of this standard, subject to the conditions of transportation and storage.

6.2. Guaranteed shelf life of semi-finished enamel - 12 months from the date of manufacture.

Sec. 5, 6.

APPENDIX

Reference

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

INFORMATION DATA

1. DESIGNED AND INTRODUCED by the Ministry chemical industry the USSR

DEVELOPERS

L. P. Lavrishchev, Ph.D. tech. sciences; M. I. Karyakina, dr chem. sciences; N. B. Gurova (topic leader); V. V. Fiti-leva

2. APPROVED AND INTRODUCED BY Decree State Committee USSR according to the standards of April 27, 1981 No. 2116

3 REVIEW FREQUENCY - 5 years

4. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

5. The limitation of the period of validity was removed by the Decree of the State Standard of the USSR of September 30, 1991 No. 1577

6. LERE EDITION (August 1993) with Amendments L 1, 2, approved in November 1986, September 1991 (ICC 2-87, 12-91)

Editor L. I. Nakhimova Technical editor V. I. Prusakova Proofreader V. S. Chernaya

Handed over ft set 28.09.93. Come on, in the oven. 10/20/93. Uel. vech. d 0.93. Uel. kr.-ott. 0.93.

Uch.-med. l. 0.80, Tyr. 1002 visas. S 7E4

Order "Badge of Honor" Publishing house of standards. 107076. Moscow, Kolodezny per. 14. Tnya, "Moskovsky printed". Moscow, Lyalin per., 6. Zak. 488

Correspondence of the color names of EP-140 enamels according to GOST 24709-81 and GOST 24709-81 with change No. 1 is given in the reference appendix.

1.4. Enamels of all colors, except silver, are supplied as a set in the form of two components: a semi-finished enamel of the corresponding color and hardener No. 2.

By agreement with the consumer, it is allowed to supply a semi-finished product of EP-140 enamel without a hardener.

The components are mixed by the consumer immediately before use, while for enamels of yellow, dark red, protective and black colors it is taken for 70 parts of the semi-finished enamel product 30 parts of hardener No. 2 by weight, for other colors - for 75 parts of the semi-finished enamel product 25 parts of hardener No. ■ 2 by weight.

1.5. Enamel EP-140 of silver color is supplied as a set in the form of three components: semi-finished enamel, hardener No. 4 and aluminum powder grade PAP-2 (GOST 5494-71).

By agreement with the consumer, it is allowed to supply semi-q>a6pHKaTa enamel EP-140 without hardener.

The component is mixed by the consumer immediately before use, while for 70 parts of the semi-finished enamel

GOST 24709-81 S. 3

30 parts of hardener No. 4 and 11 parts of aluminum powder are taken by weight.

1 6. Dilution of EP-140 enamels to a working viscosity of 12-44 s according to a VZ-246 type viscometer with a nozzle diameter of 4 mm (or VZ-4) at an enamel temperature of (20.0 ± 0.5) ° C is carried out with a grade R solvent -5A (GOST 7827-74) or a mixture of solvents consisting of acetone (GOST 2768-84), ethyl cellosolve (GOST 8313-88) and xylene (GOST 9949-76, GOST 9410-78), taken by weight 30:30: 40 respectively.

1.7. EP-140 enamels must comply with the requirements and standards specified in Table. 2.

Continuation

Name of indicator

Test method

2. External

type of coverage

After drying, the coating should be one-- with azdail, Seg>

foreign inclusions [ A small shagreen is allowed. For enamels yellow, dark-ko

brown, black, blue and dark red slight pitting allowed

3. Relative viscosity according to _ enamel semi-finished product according to ^ is _ koznmeter type VZ-24§ with a nozzle diameter of 4 mm (or VZ-4) at temperature ^ xy. pe (20.0+0.5) °С, s

4. Mass fraction of ^ volatile substances,%, in d ^ lu-fabricated enamel:

silver color black color dark red D^ eta yellow, blue c*^ tov bluish-gray, r0. blue, light gray 500, light gray $g3 (gray, ivory ’ white flowers dark green, .

many flowers

orange, dark k0 _ brown, dark grey! OG0 colors

light tobacco, that. bath, light back | IT. color 5 Degree of grinding n0 . semi-finished enamel (except for silver), microns, not more than 6. Drying time to degree 3, h, not more than:

at temperature>ur e

and small rash

at temperature>ur e

Continuation of the table. 2

Notes

1 It is allowed to increase the standard viscosity of the semi-finished enamel product during storage (by no more than 20%) if the enamel diluted to the working viscosity meets the requirements of this standard.

2 standard for the indicator "Mass fraction of non-volatile substances in the semi-finished enamel" is not defective until 01 01 94 Determination is mandatory.

3 The norm for the indicator "Hardness of the coating according to the pendulum device type TML (pendulum A)" is not defective up to 01 01 94 Determination is mandatory

4 The standard for the indicator "Coating hardness according to the pendulum device type M-3" is valid until 01 01 94.

5 The norm in terms of "Hiding power" is not rejected until 01 01 94 Determination is mandatory.

1 4-1 7. (Revised edition, Rev. L 2).

2. SAFETY REQUIREMENTS

2.1. Enamel EP-140 is a toxic and flammable material, which is due to the properties of the solvents included in its composition and used for dilution, as well as the properties of hardeners No. 2 and No. 4 used for its curing (Table 3).

2.2. Epoxy resin, which is part of the semi-finished enamel, can cause skin diseases.

Solvent vapors are irritating to the mucous membranes of the eyes and upper respiratory tract, and can cause dizziness and headaches.

2.3. In the production and use of EP-140 enamels, the requirements of the rules of sanitary and fire safety in accordance with GOST 12.3.005-75 must be observed.

2.4. All work related to the manufacture and use of enamels should be carried out in workshops equipped with supply and exhaust ventilation and fire fighting equipment in accordance with GOST 12.1.005-88.

2.5. Persons associated with the manufacture and use of EP-140 enamels must be provided with personal protective equipment (special clothing, goggles, apron, rubber gloves, protective ointments and pastes) that meet the requirements of GOST 12.4.011-89.

2.6* The production of EP-140 enamels must comply with the general explosion safety rules for explosive and fire hazardous chemical, petrochemical and oil refining industries, approved by the USSR Gosgortekhnadzor on 09/06/88.

2.7. Fire extinguishing media: sand, felt mat, OP and OU fire extinguishers, chemical or air-mechanical foam from stationary installations.

2.8. Control over compliance with maximum allowable emissions (MAE) is carried out in accordance with GOST 17.2.3.02-78. Waste disposal is carried out in accordance with the sanitary rules for the accumulation, transportation, neutralization and disposal of toxic industrial waste.

3. ACCEPTANCE

3.2. The need for testing according to the recommended indicators of Table. 2 (clauses 10, 11, 12, 13) the manufacturer and the consumer are established when concluding a contract for the supply of products.

3.3. Every hundredth batch is subjected to periodic tests for compliance with all the requirements and norms of this standard.

3.4. Upon receipt of unsatisfactory results of periodic tests, the manufacturer checks each lot until satisfactory test results are obtained in a row in at least three lots.

Sec. 2, 3. (Changed edition, Rev. No. 2).

4. TEST METHODS

4.2. Preparing for the test

Conditional viscosity, mass fraction of non-volatile substances and the degree of grinding are determined in the enamel semi-finished product.

To determine the rest of the indicators, the enamel is prepared by thoroughly mixing the semi-finished enamel of the corresponding color with the components specified in paragraphs. 1.4 or 1.5, dilute to working viscosity according to clause 1.6 and apply with a paint sprayer on plates prepared in accordance with GOST 8832-76, sec. 3.

Before application, the finished enamel is kept in a closed container for 30 minutes.

Color, appearance of the coating, time and degree of drying, elasticity of the coating in bending, resistance to static effects of water, oil and gasoline (nefras) are determined on plates of black tin (GOST 13345-85) with a size of 20X150 mm (when determining elasticity in bending) and 70X150 mm (when determining other indicators) with a thickness of 0.25-0.32 mm.

The hiding power of the enamel and the hardness of the coating are determined on glass for photographic plates sized 9x12-1.2 (TU 6-43-0205133-03-91).

The impact strength of the coating and heat resistance are determined on plates made of steel grades 08 kp or 08 ps (GOST 16523-89) with a size of 70X150 mm and a thickness of 0.8-1.0 mm.

To determine the color, appearance and hiding power, the enamel is applied until the surface to be painted is completely covered.

To determine the time and degree of drying, hardness, bending elasticity, resistance of the coating to the static effect of water, oil, gasoline (nefras), the enamel is applied in one layer.

To determine the impact strength of the coating and heat resistance, the enamel is applied in two layers.

Before hot drying, the plates are kept at a temperature of (20 ± 2) ° C for 30 minutes.

The single-layer coating is dried at a temperature of (90 ± 2) 'C for 2 hours. The thickness of the single-layer coating should be 20-25 microns.

With a two-layer coating, each layer is dried at a temperature of (90 ± 2) ° C for 2 hours. The thickness of the two-layer coating should be 40-50 microns.

4.1, 4.2. (Revised edition, Rev. No. 2).

4.3. The color and appearance of the dried enamel film is determined visually in diffused daylight.

The control of the color of the enamel film is carried out by comparing the color sample prepared for testing with the corresponding samples of the card file of standards or with approved samples of the color of the EP-140 enamel.

(Changed edition, Rev. No. 1),

4.3a. (Deleted, Rev. Lay 2).

4.4. Mass delu of non-volatile substances is determined according to GOST 17537-72. Drying of a sample weighing (2.0 ± 0.2) g is carried out in an oven at a temperature of (100 ± 2) ° C for 2 hours.

(Changed edition, Rev. M 2).

4.6. The resistance of the film to the static effect of water is determined according to GOST 9.403-80.

Before inspection, the samples are kept in air for 2 hours at a temperature of (20 ± 2) °C.

(Revised edition, Rev. No. 1).

4.7. The resistance of the film to the static effect of oil and gasoline (nefras) is determined according to GOST 9.403-80.

For testing, aviation gasoline is used according to GOST 1012-72 or nefras (C2-80/120 and SZ-80/120) according to TU 38.401 - 67-108-92 and oil according to GOST 21743-76 or GOST 982-80.

After testing in gasoline (nefras), the plates are dried with filter paper.

After removing oil and gasoline (nefras), the plates are kept in air for 1 hour and inspected.

The film should be unchanged.

(Revised edition, Rev. No. 2).

4.8. To determine the heat resistance of enamel ZP-140 of silver color, the plates with the dried film are placed in a thermostat at a temperature of (85 ± 5) ° C and the temperature is gradually increased to (250 ± 5) ° C.

After holding at (250 ± 5) °C for 3 hours, the plates are removed, cooled to a temperature of (20 ± 2) °C and visual inspection is carried out.

The film should be unchanged. Color change is allowed.

(Changed edition, Rev. Lk 1, 2).

4.9. Determining the shelf life of enamel

To YuO g of semi-finished enamel add hardener No. 2 or No. 4 according to paragraphs. 1.4 or 1.5 and mix thoroughly until a homogeneous mass is obtained. Then the enamel is diluted to a viscosity of 12–14 s in accordance with clause 1.6 and left in a jar with a tightly closed lid for 6 hours at a temperature of (20 ± 2) °C. After the specified time, the enamel is thoroughly mixed again and the viscosity, color and appearance of the film are checked.

In this case, the viscosity of the enamel should not differ from the original by more than 3 s, the appearance and color of the film should meet the requirements of this standard.

(Revised edition, Rev. No. 2).

5. PACKAGING, LABELING, TRANSPORT AND STORAGE

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Enamel EP-140- This is a two-component suspension of dye, fillers, plasticizer, hardener in an epoxy resin solution. P-5A or a mixture of acetone, xylene and ethyl cellosolve (30:40:30), 646, 648 is used as a solvent. It is intended for painting steel, copper, titanium, aluminum and magnesium alloy surfaces. It is also possible to apply enamel on acrylic, polystyrene, plastic or epoxy construction. EP-140 enamel is widely used in machine building, aircraft building and some other industries. National economy. The area to be painted must be carefully primed, for which you can use primers of the following brands: VL-023, AK-069, EP-0199, AK-070, VL-02.

Epoxy enamel EP-140 is produced in different colors(basic, according to GOST 16, but it is possible to manufacture other colors) and for each of them the number of components in the preparation of the paint is different. For example, yellow, dark red, black and protective shades require 70 parts of enamel base and 30 parts of hardener, for the rest - 75 parts of enamel and 25 hardener. As for the silver paint, 11 parts of aluminum powder of the PAP-2 brand (fine powder) are also added to it. The degree of grinding (except for silver coatings) - 40 microns. The proportion of non-volatile components (by weight) - 34 - 61%.

The advantages of the special epoxy EP-140 are its resistance to atmospheric phenomena (snow, rain), moisture, gasoline, oil, chemical detergents, mineral oils. After applying this paint and varnish product to the metal, the likelihood of developing a process such as. Silver enamel EP-140 has a rather high heat resistance (at least 3 hours at a temperature of 250 °C). Category B2 indicates that this paintwork material can be used in all climatic zones. The only exception is the Far North.

There are several methods for applying protective epoxy enamel EP-140: pneumatic spraying, pouring or painting with a brush, roller. Before each of them, it is necessary to carefully prepare the surface to ensure maximum durability and durability of the paint. To do this, the area to be painted is cleaned of dirt, scale, rust, old protective coating and must be degreased. You should also make sure that the enamel is prepared correctly, thoroughly mixed throughout the entire volume of the container (this will take at least 10 minutes), its mass is homogeneous. And the most important thing to remember is that EP-140 enamel is viable for at least six hours after its preparation.

It is recommended to apply at least 2 layers, and each subsequent one not earlier than 4-6 hours after the previous one, that is, after complete drying (subject to an ambient temperature of +20 °C). Hot drying the coating will reduce the curing time to degree 3 in just two hours. The consumption of EP-140 enamel is 50-120 grams per square meter, while the layer thickness should be 20-25 microns. The type of coating after complete drying of the paintwork material is a homogeneous semi-gloss. Covering power - about 130 - 150 g/m 2 . When bending, the elasticity of the film does not exceed 2 mm.

When working with EP-140 epoxy enamel, it is necessary to adhere to safety measures, since it is flammable and toxic. Painting should not be carried out near open fire. Gloves should be used to protect hands. To protect against enamel fumes, it is necessary to use a respiratory mask.

Enamel EP-140 is stored in rooms protected from light, moisture, direct sunlight.

Shelf life - one year from the date of production.