CHEMICAL CONVERSION COATING AGENT AND SURFACE-TREATED METAL
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United States of America Patent
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app pub date -
Jul 2, 2009
filing date -
Dec 24, 2002
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Abandoned
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Abstract
It is an object of the present invention to provide a chemical conversion coating agent containing no chromium and capable of applying good chemical conversion treatment which is equal to or more than chemical conversion treatment by zinc phosphate to all metals such as iron, zinc and aluminum.
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