| 双极性涂层浸泡过程的电化学阻抗谱行为 |
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| 引用本文： | 苏晓妹,周琼,张瑜,张清怡.双极性涂层浸泡过程的电化学阻抗谱行为[J].腐蚀与防护,2011(1). |
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| 作者姓名： | 苏晓妹 周琼 张瑜 张清怡 |
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| 作者单位： | 中国石油大学(北京)机电学院材料系; |
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| 摘 要： | 制备了仿金属钝化膜的双极性环氧基有机涂层。测试了双极性环氧基涂层/16Mn体系在5%KCl溶液中的电化学阻抗谱,以研究该体系的性能及失效过程。结果表明,在浸泡初期,由于双极性环氧基有机涂层离子选择性,能有效阻止或抑制腐蚀性介质的浸入;随浸泡时间的延长,在阴阳膜层的结合处形成空间电荷区或耗尽层,对金属腐蚀的防护起关键作用。
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| 关 键 词： | 双极性 电化学阻抗谱 离子选择性 耗尽层 |
Electrochemical Impedance Spectroscopy Behavior of Epoxy-based Bipolar Coating during Immersion |
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| SU Xiao-mei,ZHOU Qiong,ZHANG Yu,ZHANG Qing-yi.Electrochemical Impedance Spectroscopy Behavior of Epoxy-based Bipolar Coating during Immersion[J].Corrosion & Protection,2011(1). |
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| Authors: | SU Xiao-mei ZHOU Qiong ZHANG Yu ZHANG Qing-yi |
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| Affiliation: | SU Xiao-mei,ZHOU Qiong,ZHANG Yu,ZHANG Qing-yi (China University of Petroleum,Beijing 102249,China) |
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| Abstract: | An epoxy-based bipolar coating was prepared and the electrochemical behavior of the epoxy-based bipolar coating/16Mn system immersed in 5%KC1 solution was studied by electrochemical impedance spectroscopy(EIS). The results showed that at the first stage the coating could prevent the penetration of corrosive media effectively, because of its ionic selectivity.With the immersion time prolonged,the space charge region or depletion layer formed at the boundary of the anion-selective and cation-selective unipola... |
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| Keywords: | bipolar coating electrochemical impedance spectroscopy(EIS) ionic selectivity depletion layer |
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