Aqueous treatment solution for Sn-based plated steel sheet having excellent corrosion resistance and paint adhesion and method for producing surface-treated steel sheet

摘要

The organic substance (A), water-soluble chromium compound (B), water-dispersible silica (C) and water are contained, and the organic substance (A) has a hydroxyl group / carboxyl group ratio of 3/1 to 10/1 in one molecule. That the water-soluble chromium compound (B) does not contain hexavalent chromium and has a pH of 0.7 to 6.0. An aqueous treatment solution for Sn-based plated steel sheets.