SURFACE TREATMENT LIQUID FOR ZINC OR ZINC ALLOY PLATED STEEL SHEET, ZINC OR ZINC ALLOY PLATED STEEL SHEET, AND METHOD OF PRODUCING THE STEEL SHEET

摘要

According to the present invention, there is provided a zinc-based plated steel sheet having a coating film having a Zr deposition amount of 10 to 200 mg / m 2 on its surface, wherein the coating film comprises a water-soluble zirconium compound (A), water-dispersible particulate silica (B) (C), the vanadic acid compound (D), the phosphoric acid compound (E), the nickel compound (F), the acrylic resin emulsion (G) and the organopolysiloxane compound By applying a surface treatment liquid and heating and drying it is possible to obtain a zinc plated steel sheet excellent in appearance and corrosion resistance after press forming as well as excellent in oil retention and maintenance under high temperature and high temperature and high humidity environment.