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US 2021/0340650 A1Published application
Highly corrosion-resistant plated steel sheet having excellent plating adhesion and resistance to liquid metal embrittlement
AssigneePosco
InventorsIl-Jeong PARK, Myung-Soo KIM, Suk-Kyu LEE
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Abstract
Provided is a highly corrosion-resistant plated steel sheet having plating adhesion and resistance to liquid metal embrittlement. A highly corrosion-resistant plated steel sheet comprises a base steel sheet and a plated layer, which sequentially comprises an Fe—Al alloy layer and an MgZn2 layer from an interface with the base steel sheet.
Claims20
A highly corrosion-resistant plated steel sheet comprising:
- a base steel sheet;
- and
- a plating layer comprising an Fe—Al alloy layer and an MgZn2 layer sequentially from an interface with the base steel sheet.
A method of manufacturing a highly corrosion-resistant plated steel sheet, the method comprising:
- preparing a base steel sheet;
- heating the base steel sheet to a temperature of 700° C. to 1050° C.;
- dipping the base steel sheet into an aluminum-based plating bath, maintained at a temperature of 530° C. to 750° C., to obtain an aluminum-base plated steel sheet;
- adjusting a coating weight of the obtained aluminum-base plated steel sheet;
- cooling the aluminum-base plated steel sheet to a temperature of 350° C. at a cooling rate of 7 to 25° C./sec;
- and
- cooling the aluminum-base plated steel sheet from the temperature of 350° C. to a temperature of 80° C. at a cooling rate of 5 to 15° C./sec.
4 more elements
Dependencies are inferred from the claim text.