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ANTI-TARNISH COATINGS

  • US 20100291303A1
  • Filed: 11/21/2007
  • Published: 11/18/2010
  • Est. Priority Date: 11/21/2007
  • Status: Active Grant
First Claim
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1. A method for enhancing the corrosion resistance of a surface of a copper or copper alloy substrate, the method comprising:

  • depositing a metallic surface layer comprising a precious metal on the surface of the copper or copper alloy substrate; and

    exposing the copper or copper alloy substrate having the metallic surface layer thereon to an aqueous composition comprising (a) a first organic molecule comprising at least one functional group that interacts with and protects precious metal surfaces, (b) a second organic molecule comprising at least one functional group that interacts with and protects copper surfaces, and (c) a surfactant.

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