| abstract |
The surface-treated galvanized steel sheet is a steel sheet; Zinc plating on the surface of the steel sheet; And a coating having a thickness of 0.01 to 3 µm containing a resin compound, a cationic urethane resin, a vanadium compound, a zirconium compound, a phosphate group-containing compound, and an acid compound having a specific chemical structure on a surface of the plating at a specific blending ratio. The surface-treated galvanized steel sheet does not contain hexavalent chromium in the coating, and also has excellent corrosion resistance, alkali resistance and solvent resistance. |