Multilayer metal-coated steel sheet
AssigneeNisshin Steel Co., Ltd.
InventorsKatsuhiko Masaki, Suenori Mori, Tsuguyasu Yoshii
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Abstract
A multilayer metal-coated steel sheet comprising as a first layer a Zr coating layer formed on the surface of a steel sheet, and as a second layer an Al coating layer formed on said first layer. As another embodiment, also disclosed is a multilayer metal-coated steel sheet comprising as a first layer a Zr coating layer formed on the surface of a steel sheet, as a second layer an Al-Zr alloy coating layer containing Zr in an amount of 1% by weight to 50% by weight, formed on said first layer, and as a third layer an Al coating layer formed on said second layer. The multilayer metal-coated steel sheet of the present invention has an improved corrosion resistance, heat resistance and formability.
Claims14
A multilayer metal-coated steel sheet comprising as a first layer a coating layer consisting essentially of Zr formed on the surface of a steel sheet, and as a second layer an Al coating layer formed on said first layer.
A multilayer metal-coated steel sheet comprising as a first layer a coating layer consisting essentially of Zr formed on the surface of a steel sheet, as a second layer an Al-Zr alloy coating layer containing Zr in an amount of 1% by weight to 50% by weight, formed on said first layer, and as a third layer an Al coating layer formed on said second layer.
A multilayer metal-coated steel sheet comprising as a first layer a Zr coating layer formed on the surface of a steel sheet, and as a second layer an Al coating layer formed on said first layer, wherein neither Al or a AlZr alloy is in contact with said steel sheet.
Dependencies are inferred from the claim text.