METHOD FOR TREATING AND/OR COATING A SUBSTRATE WITH NON-CHROME MATERIALS
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
Mar 31, 2009
filing date -
Mar 31, 2009
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Abandoned
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Abstract
The present invention is directed to a method for coating a substrate comprising: (a) applying a caustic cleaner onto at least a portion of the substrate; (b) rinsing at least a portion of the substrate that was subjected to step (a) with water; (c) applying an acid cleaner onto at least a portion of the caustically cleaned substrate; (d) rinsing at least a portion of the substrate that was subjected to step (c) with water; and (e) applying a conversion coating comprising zirconium onto at least a portion of the acid cleaned substrate; and wherein at least one of the materials used in steps (c) and (e) is substantially chrome free. The present invention is also directed to a substrate, such as an aluminum substrate, that has been coated using the aforementioned method.
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