Electrochemical Properties of Intermetallic Phases and Common Impurity Elements in Magnesium Alloys

被引:235
作者
Suedholz, A. D. [1 ]
Kirkland, N. T. [2 ]
Buchheit, R. G. [3 ]
Birbilis, N. [1 ]
机构
[1] Monash Univ, Dept Mat Engn, ARC Ctr Excellence Design Light Met, Clayton, Vic 3800, Australia
[2] Univ Canterbury, Dept Mech Engn, Christchurch 8041, New Zealand
[3] Ohio State Univ, Dept Mat Sci & Engn, Fontana Corros Ctr, Columbus, OH 43210 USA
基金
澳大利亚研究理事会;
关键词
ALUMINUM-ALLOYS; LOCALIZED CORROSION;
D O I
10.1149/1.3523229
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The electrochemical properties of the key intermetallic particles that form in commercial Mg alloys are presented. Results were collected via microcapillary electrochemical testing upon bulk intermetallic analogs in dilute chloride solution. The intermetallics investigated were Mg(17)Al(12), Mg(2)Al(3), Mg(2)Ca, Mg(12)Ce, Mg(12)La, Mg(3)Nd, Mg(2)Si, Mg(24)Y(5), and MgZn(2). It was found that the intermetallic phases, with the exception of Mg2Ca, were more noble than Mg, supporting increased levels of cathodic kinetics; however, the variation in electrochemical response between intermetallics was large in terms of corrosion potential, presence of a passive window, and currents sustained over a range of potentials. (c) 2010 The Electrochemical Society. [DOI: 10.1149/1.3523229] All rights reserved.
引用
收藏
页码:C5 / C7
页数:3
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