| 摘要 |
The zinc-base plated steel sheet has a steel sheet, a zinc-base plating layer on the steel sheet, and a composite coating film formed on the plating layer, which composite coating layer contains a P ingredient, an N ingredient, and at least one element selected from the group consisting of Mg, Al, Ca, Ti, Fe, Co, Ni, Cu, and Mo, and is prepared by applying an aqueous solution containing a cationic ingredient ( alpha ) and a phosphoric acid ingredient ( beta ) onto the surface of plating layer on the zinc-base plated steel sheet, and then drying the applied aqueous solution, without giving washing with water, and which cationic ingredient ( alpha ) consists essentially of at least one metallic ion selected from the group consisting of Mg, Al, Ca, Ti, Fe, Co, Ni, Cu, Mo, and NH4<+> ions. <IMAGE> |
