Zinc-Aluminum Double Layer Alloy Plated Steel Sheet Excellent in Adhesion and Corrosion Resistance and Manufacturing Method Thereof

摘要

The present invention relates to a method for simultaneously evaporating zinc and aluminum while continuously conveying a steel sheet by adjusting a supply gap of two crucible spacings and an electron beam irradiated to each crucible in a single vacuum screen, Wherein the upper and lower layers are separated and adhered to each other by forming an alloy layer having different composition ratios so that both the adhesion and the corrosion resistance are simultaneously imparted to the zinc-aluminum double layer type alloy coated steel sheet.