ZINC-ALUMINA DISPERSEDLY PLATED STEEL SHEET EXCELLENT IN PITTING RESISTANCE AND COATING CAPACITY

摘要

PURPOSE: To improve the corrosion resistance of a steel sheet by applying a steel sheet contg. specified amounts of C, Mn, Cu, Ni, Cr, P, Ti, Al, B, Nb and Fe with a plated layer contg. specified amounts of Co, Cr, Ni, Fe, alumina and Zn. ;CONSTITUTION: This steel sheet is the one contg., by weight, 0.001 to 0.1% C and 0.1 to 1.5% Mn; contg. one or more kinds among 0.1 to 0.5% Cu, 0.05 to 0.5% Ni and 0.05 to 1.5% Cr, furthermore contg. one or more kinds among 0.03 to 0.15% P, 0.03 to 0.5% Ti, 0.03 to 0.2% Al, 0.001 to 0.05% B and 0.001 to 0.02% Nb, and the balance substantially iron. The steel sheet is plated with a zinc-alumina dispersedly plated layer contg. 0.1 to 30% of one or more kinds of elements among Co, Cr, Ni and Fe, furthermore contg. 0.01 to 3% alumina, and the balance zinc. The plated steel sheet has sufficient pitting resistance and coating suitability.;COPYRIGHT: (C)1996,JPO