HIGH CORROSION RESISTANCE Mg-CONTAINING HOT DIP Zn-Al ALLOY PLATED STEEL SHEET GOOD IN SURFACE APPEARANCE

摘要

PROBLEM TO BE SOLVED: To provide a high corrosion resistance Mg-contg. hot dip Zn-Al alloy plated steel sheet good in surface appearance and producible on an industrial mass-production line. ;SOLUTION: A plating layer contg., by mass, 25 to 70% Al, 1.5 to 6.0% Mg and 0.01 to 1.0%, preferably 0.07 to 1.0% Sr, contg. Si in the range in the inequality, Al(mass%)×0.005≤Si(mass%)≤10, preferably in the range in the inequality, Al(mass%)×0.03≤Si(mass%)≤10 and the balance Zn with inevitable impurities is formed on the surface of a steel sheet.;COPYRIGHT: (C)2000,JPO