Plated Steel Sheet

Abstract: [Problem] To further improve hydrogen desorption while maintaining post-coating corrosion resistance. [Solution] A plated steel sheet according to the present invention includes, atop the surface of the steel sheet, a plating layer that includes, by mass, Al: 0.50 to 5.00%, Mg: 0.50 to 3.00%, Fe: 0.01 to 15.00% and that selectively further includes one or two or more types selected from an element group A, an element group B, an element group C, an element group D, an element group E, an element group F, and an element group G, the remainder of the plating layer having a chemical composition comprising Zn and an impurity. In a surface structure when the plating layer is in plan view, a mean area ratio of an a precipitated ? phase, which is a metal structure obtained by an a phase being precipitated in an ? matrix phase, is 5 to 95%, and when a region of 130 µm × 100 µm of the surface of the plating layer is observed using an electron microscope, the sum total of the length of cracks present in the region is 50 µm or more.

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