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Influence of rare earth salt on the microstructure and corrosion resistance of water-based zinc-aluminum alloy coating
Author(s): 
Pages: 51-54
Year: Issue:  6
Journal: Electroplating & Finishing

Keyword:  锌铝合金涂层水性硝酸铈耐蚀性微观结构电化学阻抗谱;
Abstract: 研究了稀土盐对水性锌铝合金涂层的组织结构和耐蚀性能的影响.扫描电镜、能谱和X射线衍射分析表明,合金涂层由片层状的锌和铝紧密构成,在片层间存在致密的稀土转化膜;中性盐雾试验、电化学阻抗谱(EIS)和极化曲线测试表明,当Ce(NO3)3的含量为5 g/L时,涂层耐盐雾腐蚀时间达到600h,是没有加入稀土的涂层的2倍.含稀土盐的涂层的高耐蚀性与其中形成的硅烷-稀土协同钝化作用有关.
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