FIELD: metallurgy.
SUBSTANCE: proposed composition for processing of galvanised steel contains the following components in wt %: CrO3 ions - 10.0-15.0, Cr3+ ions - 4.0-6.0, PO4 -2 ions - 12.0, ammonium polyacrylate - 6.0-7.0, surfactant 10 - 0.5-1.0, monoethanolamides - 1.0-2.0, water making the rest.
EFFECT: efficient protection of galvanised steel against white rust and black discoloration.
2 tbl, 4 ex
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