POSCO Holdings Inc.
Plated steel material having excellent friction resistance and white rust resistance and method for preparing same

Abstract:

A plated steel material includes a plated layer containing, by wt %: 0.5 to 14% of Al, 0.5 to 5% of Mg, and the balance being Zn and inevitable impurities. The plated steel material satisfies the following Equation: ([Mg].sub.S-[Mg].sub.1/2)/[Mg].sub.1/2.gtoreq.0.3. [Mg].sub.S means a content (wt %) of Mg in a surface of the plated layer, and [Mg].sub.1/2 means a content (wt %) of Mg at a 1/2t position (t represents a thickness of the plated layer) from the surface of the plated layer in a thickness direction.