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Process and composition for treating metal surfaces using trivalent chromium compounds

  • US 8,591,670 B2
  • Filed: 05/07/2008
  • Issued: 11/26/2013
  • Est. Priority Date: 05/07/2008
  • Status: Active Grant
First Claim
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1. A composition for treating a metal surface, said composition comprising water, a trivalent chromium compound, an organo-functional silane, a compound of a group IV-B element, and at least one polymer comprising poly (methyl vinyl ether/maleic acid) and poly (vinyl alcohol).

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