VAPOR-DEPOSITED AL-CR PLATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE AFTER COATING

摘要

PURPOSE:To offer a vapor-deposited Al-Cr plated steel sheet excellent in corrosion resistance after coating and suitable as a high corrosion resistant surface- treated steel sheet used for automobiles and house appliances or the like. CONSTITUTION:On the surface of a steel sheet, a vapor-deposited Al-Cr alloy plated layer contg. 1 to 30% Cr is formed by =1g/m2, on its upper layer, galvanizing contg. 1 to 20% Al hydroxide and/or Al oxide is formed by 0.1 to 3g/m2.