Chromate-free phosphate bonding composition
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United States of America Patent
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Apr 9, 2002
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app pub date -
Oct 18, 1999
filing date -
Oct 18, 1999
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Abstract
A heat curable bonding composition for providing a coating to a solid substrate comprises water, phosphate ions, borate ions, and aluminum ions. The bonding composition has a pH in the range from about 1.4 to about 2.2, and is substantially free of chromate ions, molybdate ions, and magnesium ions.
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