Pit growth in a Ni–Nb metallic glass compared with its crystalline counterpart

作者: Z.M. Wang , J. Zhang , J.Q. Wang

DOI: 10.1016/J.INTERMET.2010.06.010

关键词: Materials scienceAmorphous solidDissolutionPitting corrosionMetallurgyElectrochemistryMetalCorrosionCrevice corrosionAmorphous metal

摘要: The growth and repassivation behavior of metastable pits in a Ni(50)Nb(50) metallic glass, as well its crystalline counterpart, were investigated by statistical analysis on the current transients potentio-static measurements results show that amorphous sample demonstrates higher transient current, shorter pit times than crystallized Comparisons rates charges passed during pitting reveal alloy grow faster but with smaller final volumes. Iris suggested structure can induce rapid dissolution thus promote accumulation passivating elements (Nb), resulting rate A notable effect early is determined. (C) 2010 Elsevier Ltd All rights reserved

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