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US 2021/0381091 A1Published application
Zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and method for producing same
AssigneePosco
InventorsHeung-Yun KIM, Do-Kyeong HAN, Myung-Soo KIM
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Abstract
Provided is a zinc alloy-plated steel material used in automobiles, building materials, home appliances, or the like, and more specifically, to a zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and a method for producing same.
Claims10
A zinc alloy-plated steel material having excellent corrosion resistance and surface qualities, the zinc alloy-plated steel material comprising:
- base steel and a zinc alloy-plating layer formed on the base steel,
- wherein the zinc alloy-plating layer includes, by weight %, 8 to 25% of aluminum (Al), 4 to 12% of magnesium (Mg), and a balance of zinc (Zn) and inevitable impurities, and
- an area fraction, occupied by a polygonal solidification phase observed on a surface of the zinc alloy-plating layer, is 20 to 90%.
A method of manufacturing a zinc alloy-plated steel material having excellent corrosion resistance and surface qualities, the method comprising:
- preparing base steel;
- dipping the prepared base steel in a plating bath to be plated, the plating bath including, by weight %, 8 to 25% of aluminum (Al), 4 to 12% of magnesium (Mg), and a balance of zinc (Zn) and inevitable impurities;
- wiping the plated base steel;
- and
- forming a polygonal solidification phase on a surface of a hot-dip galvanized layer after the wiping.
2 more elements
Dependencies are inferred from the claim text.