Patent ID: 7695826

Claim:
An alloyed molten zinc plated steel sheet characterized by comprising a steel sheet including, by wt %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 2.5% and further including at least one of: P: 0.001 to 0.05%, S: 0.001 to 0.05%, Al: 0.01% to 2%, B: 0.0005% to less than 0.01%, Ti: 0.01% to less than 0.1%, V: 0.01% to less than 0.3%, Cr: 0.01% to less than 1%, Nb: 0.01% to less than 0.1%, Ni: 0.01% to less than 2.0%, Cu: 0.01% to less than 2.0%, Co: 0.01% to less than 2.0%, Mo: 0.01% to less than 2.0%, with the balance comprised of Fe and unavoidable impurities, having on its surface a Zn alloy plating layer comprised of Fe in a concentration of 7 to 15 wt %, Al in a concentration of 0.01 to 1 wt %, and the balance of Zn and unavoidable impurities, said plating layer containing oxide particles of at least one type of oxide selected from the group consisting of an Al oxide, Si oxide, Mn oxide, Al and Si complex oxide, Al and Mn complex oxide, Si and Mn complex oxide, and Al, Si, and Mn complex oxide alone or in combination, and an average diameter of the particle size of said oxide is 0.01-1 μm.