MOLTEN ALUMINUM ALLOY-PLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND WELDABILITY, AND METHOD FOR PRODUCING SAME

摘要

The present invention relates to a molten aluminum alloy-plated steel sheet having excellent corrosion resistance and weldability, and a method for producing same. A plated steel sheet according to one aspect of the present invention may be a molten aluminum alloy-plated steel sheet having excellent corrosion resistance and weldability and comprising a molten aluminum alloy plating film including: an interface alloy layer present at the interface with the steel sheet; and a plating upper layer disposed on the interface alloy layer, wherein a phase having an atomic ratio between Fe and Al of between 1:2.8-1:3.3 constitutes at least 70% by area of the phases present within 1 µm in the interface alloy layer direction from the boundary between the interface alloy layer and a base steel sheet.