ALTERNATIVE COMPOSITION AND ALTERNATIVE METHOD FOR EFFICIENT PHOSPHATING OF METAL SURFACES Russian patent published in 2023 - IPC C23C22/18 C23C22/34 C23C22/82 

Abstract RU 2805161 C2

FIELD: metal processing.

SUBSTANCE: aqueous composition for phosphating metal surfaces, a method for phosphating metal surfaces and a method for manufacturing this composition. Acid aqueous composition for phosphating metal surfaces contains zinc ions, manganese ions, phosphate ions and at least one accelerating additive of the R1R2R3C-NO2 formula in which each of the substituents R1, R2 and R3 on carbon atom is independently selected from the group consisting of hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 1-hydroxypropyl, 2-hydroxypropyl, 3-hydroxypropyl, 1-hydroxy-1-methylethyl and 2-hydroxy-1-methylethyl.

EFFECT: film adhesion and corrosion control results comparable to those obtained with phosphating using nitroguanidine as an accelerator.

17 cl, 4 tbl

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RU 2 805 161 C2

Authors

Tseglarek Timo Kristof

Vittsorek Khardi

Dates

2023-10-11Published

2020-01-23Filed