| 摘要 |
PURPOSE:To obtain an Zn-Ni composite plated steel sheet having extremely superior corrosion resistance and workability by forming a Zn-Ni-Al2O3 layer contg. specified amounts of Ni and Al2O3 besides Zn as the principal component on the surface of a steel sheet as a base material by composite plating. CONSTITUTION:A Zn-Ni-Al2O3 layer consisting of 5-18wt% Ni, 0.1-15wt% Al2O3 and the balance Zn is formed on the surface of a steel sheet as a base material by composite plating. The corrosion resistance of the resulting composite plated steel sheet is about twice as high as the corrosion resistance of a conventional Zn-Ni alloy plated steel sheet in case of the same thickness of plating, and the composite plated steel sheet has satisfactory workability comparable to the workability of a galvanized steel sheet. |
