POSCO Holdings Inc.
HOT DIP ALUMINIZED STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE AND WORKABILITY, AND MANUFACTURING METHOD THEREFOR

Abstract:

Provided is a hot dip aluminized steel material including a base steel and a hot-dip Al--Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt % to 20 wt % of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al--Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.