Metal-coated steel strip
AssigneeBluescope Steel Limited
InventorsNega Setargew, Wai Yee Daniel Yuen
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Abstract
A method of forming an Al—Zn—Si—Mg alloy coating on a strip that includes dipping strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on the strip, with the Al—Zn—Si—Mg alloy containing in % by weight: Al: 2 to 19%, Si: 0.1 to 2%, Mg: 1 to 10%, and Zn: 80 to 97%, and with the bath having a molten metal layer and a top dross layer on the metal layer, and the method including providing Ca in the composition of the bath to minimise the top dross layer in the molten bath.
Claims15
A method of forming an Al—Zn—Si—Mg alloy coating on a strip that includes dipping the strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on the strip, with the Al—Zn—Si—Mg alloy containing in % by weight:
- Al:
- 2 to 19% , Si:
- 0.1 to 2% , Mg:
- 1 to 10% , and Zn:
- 80 to 97% , and with the bath having a molten metal layer and a top dross layer on the metal layer, and the method including providing Ca in the composition of the bath to minimise the top dross layer in the molten bath.
Dependencies are inferred from the claim text.