Abstract
The kinetics of zinc dissolution in buffered acetic acid solutions are described. The dissolution process occurred along the walls of zinc tubes with acid solutions passing through the tubes in laminar flow. Only a moderate degree of diffusional resistance in transporting reactants to the reaction surface was observed. The data indicate that molecular acetic acid as well as hydrogen ions participate in the cathodic reaction. Possible dissolution mechanisms are proposed based on simultaneous reactions involving hydrogen ion and molecular acid discharge at the metal surface. Only at high acid concentrations does the molecular acetic acid discharge reaction become important.
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