Kinetics of the Dissolution of Copper in Aqueous Solutions of Aliphatic Amines

Abstract
Studies of the rate of dissolution of copper in aqueous solutions of ammonia, and methyl‐, ethyl‐, and n‐butylamines under a high pressure of oxygen have shown the reaction to occur in two stages: a rapid pre‐equilibrium involving the free amine molecule, and a slower reaction step involving either the free amine molecule or its conjugate acid. This mechanism leads to a partial understanding of the passivity of copper surfaces in nearly neutral amine solutions.

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