Abstract

The anodic dissolution of commercial Monel 400 alloy in a de-aerated 0.5 M Na 2SO 4 solution of pH 8.2 has been studied using a combination of a rotating ring-ring electrode and linear sweep voltammetry. Dissolution of copper from the alloy in Na 2SO 4 solutions proceeds directly to a Cu 2+ species without generation of detectable amounts of Cu + intermediates. The anodic behavior of Monel 400 alloy in Na 2SO 4 solutions has been found to be strongly mass transport dependent with reactions displaying different kinetics at electrode rotation speeds below and above 1600 rpm. A model has been proposed that provides an explanation of the behavior under different fluid flow conditions.

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