The effect of Zn concentration on the corrosion behavior of Mg-xZn alloys
The effect of Zn concentration on the corrosion behavior of Mg-xZn alloys
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DOI：
10.1016/j.corsci.2012.08.037
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发表时间：
2012-12-01
影响因子：
8.3
通讯作者：
You, Bong Sun
中科院分区：
文献类型：
--
作者：
Song, Yingwei;Han, En-Hou;You, Bong Sun
研究了锌浓度对镁锌合金腐蚀行为的影响。用扫描电子显微镜(SEM)观察了涂层的微观结构。通过电化学和浸泡试验对其耐蚀性进行了评价。在电化学测试和腐蚀形貌观察的基础上，分析了腐蚀的萌生和扩展。结果表明，晶界上析出了第二相，其体积分数随锌含量的增加而增加。结果表明，随着锌含量的增加，镁锌合金的耐蚀性降低，这与镁锌第二相的微阴极效应有很大关系。(C)2012爱思唯尔有限公司。保留所有权利。
The effect of Zn concentration on the corrosion behavior of Mg-xZn alloys is investigated. The microstructure is observed by scanning electron microscopy (SEM). The corrosion resistance is evaluated by electrochemical and immersion tests. The initiation and propagation of corrosion are analyzed based on the electrochemical measurements and corrosion morphologies observation. It is found that the MgxZny second phases are precipitated on the boundaries and their volume fractions rise with increasing Zn concentration. As a result, the corrosion resistance of Mg-xZn alloys reduces with increasing Zn concentration, which is greatly associated with the micro-cathodic effect of the MgxZny second phases. (C) 2012 Elsevier Ltd. All rights reserved.