Methods for passivating a metal substrate and related coated metal substrates
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United States of America Patent
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Sep 11, 2012
Grant Date -
Nov 11, 2010
app pub date -
May 11, 2009
filing date -
May 11, 2009
priority date (Note) -
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Abstract
Disclosed are methods for passivating metal substrates, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The methods comprise the steps of autodepositing copper, silver, a IIIB metal and/or IVB metal onto at least a portion of the substrate, and simultaneously and/or immediately subsequently electrophoretically depositing on the substrate a curable, electrodepositable coating composition; wherein the copper, silver, IIB metal and/or IVB metal and the curable, electrodepositable coating composition are both contained within a single bath composition. The present invention also relates to coated substrates produced by the above methods.
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