FIELD: protective coats; treatment of carbon and low-alloy steels for obtaining phosphate film prior to application of protective coats.
SUBSTANCE: proposed rust converter is designed for use at temperatures from minus 30°C to plus 40°C contains ortho-phosphoric acid, alcohol C1-C4 or their mixture at any ratio, corrosion inhibitor and water at the following ratio of components, mass-%: ortho-phosphoric acid, 3.0-5.0; alcohol C1-C4 or their mixtures, 79.5-86.0; water, 11.0-15.0; corrosion inhibitor, 0.2-0.3. Corrosion inhibitor contains triethanol amine.
EFFECT: extended range of working temperatures; enhanced ecological safety due to reduced concentration of ortho-phosphoric acid.
2 cl, 1 tbl, 1 ex
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