The corrosion-proof processing methodological null below-mentioned foundation processing liquid of the steel material which uses the non chromic acid corrosion-proof medicine and

摘要

PROBLEM TO BE SOLVED: To provide an anticorrosive which can impart an anticorrosion property and a self-recovery function equal to those of a chromic-acid-based anticorrosive to a ferrous material, even though being a chromic-acid-free anticorrosive, and to provide anticorrosion treatment with the use of the anticorrosive.;SOLUTION: The anticorrosive is a two-component anticorrosive for the ferrous material formed of the following primary surface treatment liquid (A) and surface treatment liquid (B), wherein the primary surface treatment liquid (A) is an aqueous solution of zinc phosphate, which is prepared by adding at least one zinc salt selected from the group consisting of zinc sulfate, zinc nitrate, zinc chloride and zinc acetate to an aqueous solution of at least one phosphate selected from the group consisting of phosphoric acid, sodium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate and tripotassium phosphate, and further by adjusting the pH to 1.5-5; and a surface treatment liquid (B) is an acidic aqueous solution of humic acid, which is prepared by adding at least one metal salt selected from the group consisting of cerium(III) acetate, zinc sulfate, zinc acetate, zinc acrylate and zinc nitrate to an aqueous solution of humic acid.;COPYRIGHT: (C)2012,JPO&INPIT