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Corrosion behavior of copper alloys in chloride media

机译：铜合金在氯化物介质中的腐蚀行为

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摘要

The potentiodynamic polarization behavior of copper alloys in chloride solutions (1 M NaCl) of different pH's (6.5 and 10) was investigated. Three commercial alloys of nominal composition Cu-30Ni (Cu-Ni), Cu-30Zn (Cu-Zn) and 90Cu-8Al-2Fe (Cu-Al) were considered. Results at pH of 6.5 showed no evidence of passivity with polarization behavior being dominated by the Cu component. At pH of 10, however, some evidence of limited passivity was seen. Passivity was more evident in buffered chloride (pH 10), in particular for Cu-Zn which showed remarkable passive behavior over a wide potential range. A sudden increase in the current density occurred when the anodic potential exceeded a certain critical potential, i.e., film breakdown potential. The results of these experiments are discussed in reference to potential-pH (Pourbaix) diagrams of the alloying elements.
机译：研究了铜合金在不同pH值（6.5和10）的氯化物溶液（1 M NaCl）中的电势极化行为。考虑了三种标称成分为Cu-30Ni（Cu-Ni），Cu-30Zn（Cu-Zn）和90Cu-8Al-2Fe（Cu-Al）的商业合金。 pH值为6.5时，结果没有显示钝化的迹象，极化行为受Cu成分支配。但是，在pH值为10时，可以看到一些钝度有限的证据。在缓冲氯化物（pH 10）中，钝化更为明显，特别是对于在宽电位范围内表现出显着的钝化行为的Cu-Zn。当阳极电势超过某一临界电势，即膜击穿电势时，电流密度突然增加。参照合金元素的电位-pH（Pourbaix）图讨论了这些实验的结果。

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  • 来源
    《Materials & design》 |2009年第7期|2425-2430|共6页
  • 作者

    A.M. Alfantazi; T.M. Ahmed; D. Tromans;

  • 作者单位

    The University of British Columbia, Department of Materials Engineering, 309-6350 Stores Road, Vancouver, BC, Canada VST 1Z4;

    The University of British Columbia, Department of Materials Engineering, 309-6350 Stores Road, Vancouver, BC, Canada VST 1Z4;

    The University of British Columbia, Department of Materials Engineering, 309-6350 Stores Road, Vancouver, BC, Canada VST 1Z4;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    corrosion; non-ferrous metals and alloys; environmental performance;

    机译：腐蚀;有色金属和合金;环保性能;

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