SOLUTION OF PHOSPHATISATION WITH HYDROGEN PEROXIDE AND CHELATE FORMING CARBONIC ACIDS Russian patent published in 2011 - IPC C23C22/17 C23C22/18 C23C22/36 

Abstract RU 2428518 C2

FIELD: metallurgy.

SUBSTANCE: acid water solution for phosphatisation contains from 0.2 to 3 g/l of ions of bivalent zinc, from 3 to 50 g/l of ions of phosphate in terms of PO3-4, from 15 to 50 mg/l of hydrogen peroxide or equivalent amount of substance removing hydrogen peroxide, from 0.5 to 1.0 g/l of one or several aliphatic chelate forming carbonic acids containing from 2 to 7 of carbon atoms with maximal one point of contents of free acid.

EFFECT: accelerated formation of closed fine-crystalline phosphate coating on treated metal surface at simultaneous termination of rust formation.

9 cl, 6 dwg, 1 tbl

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RU 2 428 518 C2

Authors

Brouver Jan-Villem

Vavzhinjak Ezhi-Tadeush

Kremer Jens

Shenkherr Maksimilian

Dates

2011-09-10Published

2006-08-16Filed