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Method of inhibiting the corrosion of copper in aqueous mediums

  • US 4,744,950 A
  • Filed: 08/22/1986
  • Issued: 05/17/1988
  • Est. Priority Date: 06/26/1984
  • Status: Expired due to Term
First Claim
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1. A method of providing a durable, long lasting chemically resistant, pH tolerant, corrosion inhibiting film on the surface of copper or copper containing metal in contact with an aggressive dynamic aqueous system substantially free of glycols having a pH substantially neutral to alkaline which comprises adding in a non-continuous manner a sufficient amount for the purpose of an alkyl benzotriazole having the formula ##STR2## where R is a C3 to C6 linear hydrocarbon, and permitting contact of said triazole for a time sufficient to provide said film and thereafter discontinuing the feed of said triazole and permitting any residual triazole to deplete.

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