Abstract
AbstractThis study focuses on the electrochemical behavior of brass in acidic and alkaline tap water. Both conditions were studied using corrosion potential, cyclic polarization and electrochemical impedance spectroscopy. Weight loss experiments were also performed to validate corrosion behavior. It was evaluated from corrosion potential values and Pourbaix diagrams that brass surface was aggressively attacked at lowpHdue to dissolution of zinc-rich phase and solvation of cuprite and zincate at highpHby breakdown of the passive film. Under near neutral conditions the increase in charge transfer resistance corresponded to formation of a stable passive film. Brass exhibited peculiar behavior atpH1 and 12 by showing low charge transfer resistance due to preferential attack of zinc and solvation of copper/zinc rich phases, respectively, as validated by impedance spectroscopy.
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