| 摘要 |
A zinc-based metal plated steel sheet which comprises a steel sheet, a zinc- based metal plating layer formed on the steel sheet, and a composite coating layer formed on the surface of the plating layer, wherein the composite film comprises, as components constituting the film, a P component and at least o ne selected from the group consisting of an N component, Mg, Al, Ca, Ti, Fe, Co , Ni, Cu and Mo; and a method for producing the steel sheet which comprises applying an aqueous solution containing a cationic component (a) and a phosphate component (.szlig.) on the surface of the plating layer of the zin c- based metal plated steel sheet, and subsequently drying it without washing with water to form a coating film, wherein the cationic component (a) comprises substantially at least one metal ion selected from the group consisting of Mg, Al, Ca, Ti, Fe, Co, Ni, Cu, Mo and NH4+. |
