Environmental effects on selective dissolution from ZnAlMg alloy under low frequency alternating current perturbations
By Shkirskiy, V.; Maltseva, A.; Ogle, K.; Volovitch, P.
Published in Electrochimica Acta
NULL
2017
Abstract
Abstract Real time measurement of elemental dissolution rates by atomic emission spectroelectrochemistry under alternating current (AC) perturbations of ZnAlMg alloy was used to precise mechanisms controlling selective dissolution as a function of pH in chloride containing solutions in the presence of NH4+. At pH values of 8.5 and 10.5 Zn and Mg dissolution currents (jZn, jMg) followed the total current je* respecting the stoichiometry of Zn2Mg at the maximum of anodic current in solution at pH 8.5. Al dissolution current (jAl) followed je* at pH 10.5 and 8.5 with a phase shift of 180
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