首页> 外文期刊>Corrosion science >Corrosion behaviour in salt spray and in 3.5% NaCl solution saturated with Mg(OH)_2 of as-cast and solution heat-treated binary Mg-RE alloys: RE = Ce, La, Nd, Y, Gd
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Corrosion behaviour in salt spray and in 3.5% NaCl solution saturated with Mg(OH)_2 of as-cast and solution heat-treated binary Mg-RE alloys: RE = Ce, La, Nd, Y, Gd

机译:在盐雾中以及在铸态和固溶热处理过的二元Mg-RE合金的Mg(OH)_2饱和的3.5%NaCl溶液中的腐蚀行为:RE = Ce,La,Nd,Y,Gd

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摘要

Corrosion behaviour was characterised in salt spray and in 3.5% NaCl solution saturated with Mg(OH)_2 of as-cast and solution heat-treated binary Mg-RE alloys. The corrosion rate in the immersion test for the solution heat-treated Mg-RE alloys was substantial, and was greater than that of high-purity Mg. These corrosion rates were probably caused by the particles in the microstructure and/or by Fe rich particles precipitated during the solution heat-treatment. The corrosion rate in the immersion tests for each as-cast Mg-RE alloy was greater than that of high-purity Mg, attributed to micro-galvanic acceleration caused by the second phase. Corrosion rates in salt spray had a general correlation with corrosion rates in the immersion tests, but there were differences. The values of apparent valence were always less than 2 consistent with Mg corrosion being only partly under electrochemical control.
机译:在盐雾中以及在铸态和固溶热处理过的二元Mg-RE合金的Mg(OH)_2饱和的3.5%NaCl溶液中表征腐蚀行为。固溶热处理过的Mg-RE合金在浸没测试中的腐蚀速率很高,并且比高纯Mg高。这些腐蚀速率可能是由于微观结构中的颗粒和/或固溶热处理期间沉淀的富铁颗粒引起的。每种铸态Mg-RE合金在浸没测试中的腐蚀速率都大于高纯Mg的腐蚀速率,这归因于第二相引起的微电流加速。盐雾中的腐蚀速率与浸入试验中的腐蚀速率具有一般的相关性,但存在差异。表观价态的值始终小于2,这与Mg腐蚀仅在电化学控制下部分保持一致。

著录项

  • 来源
    《Corrosion science》 |2013年第11期|98-118|共21页
  • 作者单位

    The University of Queensland, Materials Engineering, Brisbane, Qld 4072, Australia;

    The University of Queensland, Materials Engineering, Brisbane, Qld 4072, Australia;

    The University of Queensland, Materials Engineering, Brisbane, Qld 4072, Australia,Oak Ridge National Lab, Corns Sci & Techno/, Oak Ridge, TN 37831-6156. USA;

    GM China Science Lab, 56 Jinwan Road, Pudong, Shanghai 201206. China;

    The University of Queensland, Materials Engineering, Brisbane, Qld 4072, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A. Magnesium; A. Rare earth elements; B. Weight loss; B. SEM; B. E1S;

    机译:A.镁A.稀土元素;B.减肥;扫描电镜B.E1S;

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