Enamel EP-773

Specifications :

No	The name of indicators	Requirements TNPA
one	Color enamel film	Must be within the limits of permissible deviations established by the approved control color samples of Lakokraska OJSC
2	The appearance of enamel film	After drying, the enamel film should be uniform, smooth, without foreign inclusions. Easy shagreen skin and single pock marks are allowed.
3	Conditional viscosity of semi-finished enamel by viscometer type VZ – 246 with a nozzle diameter of 4 mm at a temperature of (20 ± 0.5) ° С, s	25 – 60
four	Mass fraction of non-volatile substances in the enamel semi-finished product,%	63 ± 3
five	Enamel drying time to degree 5, h, not more: at (20 ± 2) ° С at (120 ± 2) ° С	24 2
6	The degree of grinding of enamel semi-finished product, micron, not more	50
7	Adhesion of film, points, not more	one
eight	Film hardness by pendulum device, conventional units, not less than type M-3 type TML (pendulum A)	0.5 0.3
9	Film strength at impact, cm, not less	50
ten	Bending elasticity of the coating, mm, not more	five
eleven	The resistance of the film to the static effect of a 40% strength solution of potassium hydroxide at a temperature of (100 ± 2) ° C, h, not less than, for green color and other colors	eight 2
12	Enamel shelf life at a temperature of (20 ± 2) ° С after mixing the components, h, at least:	24

Surface preparation: The  preparation of the surface of the product for enamel painting is carried out in accordance with the requirements of the TNPA on the product, GOST 9.402 or STB ISO 12944-4.

С металлической поверхности должны быть удалены масло, смазка, маркировочная краска, грязь и другие вещества, например минеральные загрязнения, водорастворимые соли, влияющие на качество подготовки поверхности. Необходимо удалить насечки, заусенцы, сварочные брызги, скруглить острые кромки, углы, зубцы и сварочные швы. Затем поверхность должна быть тщательно очищена от ржавчины, окалины и других загрязнений, обеспылена, обезжирена и просушена. Наиболее тщательно необходимо очищать поверхность в зоне сварных швов шириной до 3 см от остатков флюсов, щелочных шлаков и оксидов, образующихся при сварке.

Для улучшения защитных свойств поверхность рекомендуется предварительно очистить пескоструйной или дробеструйной обработкой до степени очистки от окислов 1 – 2 по ГОСТ 9.402.

Coating : Enamel is applied by pneumatic spraying. It is allowed to apply with a brush to paint inaccessible places in products of complex configuration.

Before applying to the semi-finished enamel it is necessary to add hardener No. 1 in the ratio of 3.5 m.ph. hardener per 100 m.h. enamel semi-finished product, mix thoroughly, dilute to working viscosity 15 – 16 with solvent 646 GOST 18188-72 and incubate for 1 hour.

Enamel is applied at a temperature not lower than 15 ° С and relative air humidity not more than 65%.

The consumption of  dried single-layer enamel coating with a thickness of 20 – 25 microns is 75 – 90 g / m² and depends on the preparation, the complexity of the painted surface, color and other factors.

Precautionary measures : When carrying out painting works, and also after their termination it is necessary to air the room; use personal protective equipment (clothing, goggles, rubber gloves).

Storage:  Store prefabricated enamel in a tightly closed container, protecting from moisture and direct sunlight. Keep away from fire! The formation of sediment and delamination during storage of the semifinished product soil – enamel is allowed, if after thorough mixing and adding hardener the soil – the enamel meets the requirements of TNPA.