METHOD OF PRODUCING METAL COATED STEEL STRIP
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United States of America Patent
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Sep 24, 2015
app pub date -
Oct 17, 2013
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Oct 18, 2012
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Abstract
A method of forming a coating of a metal alloy on a steel strip to form a metal alloy coated steel strip is disclosed. The method includes a hot dip coating step of dipping steel strip into a bath of molten metal alloy and forming a metal alloy coating on exposed surfaces of the steel strip. A native oxide layer as defined herein forming on the metal alloy coating of the metal alloy coated strip emerging from the metal coating bath. The method includes controlling the method downstream of the hot dip coating step and/or selecting the metal coating composition to maintain the native oxide layer at least substantially intact on the metal alloy coating during the downstream steps.
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