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
