Method of inhibiting the corrosion of copper in aqueous mediums
First Claim
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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Accused Products
Abstract
A method of providing a durable, long lasting chemically resistant, pH tolerant, corrosion inhibiting film on the surfact of copper or copper containing metal in contact with an aggressive aqueous system is disclosed. The copper or copper containing metal generally composes a structure of dynamic cooling water system, and protection is afforded thereto by intermittently feeding to the aqueous medium a sufficient amount of a C3 to C6 alkyl substituted benzotriazole.
58 Citations
15 Claims
- 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.
- 8. A method of providing a durable, long lasting chemically resistant, pH tolerant, corrosion inhibiting film on the surface of copper or copper containing metal of an open cooling water system which copper or metal is in contact with a dynamic aggressive aqueous medium of said system, which medium is substantially free of glycols and has a pH substantially neutral to alkaline, which method comprises adding in a non-continuous manner a sufficient amount for the purpose of an alkyl benzotriazole having the formula ##STR3## 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.
Specification