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首页> 外文期刊>Corrosion science >Passivation of Al-Cr-Fe and Al-Cu-Fe-Cr complex metallic alloys in 1 M H2SO4 and 1 M NaOH solutions
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Passivation of Al-Cr-Fe and Al-Cu-Fe-Cr complex metallic alloys in 1 M H2SO4 and 1 M NaOH solutions

机译:Al-Cr-Fe和Al-Cu-Fe-Cr复合金属合金在1 M H2SO4和1 M NaOH溶液中的钝化

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摘要

The corrosion mechanisms of AI-Cr-Fe and Al-Cu-Fe-Cr complex metallic alloys have been investigated by potentiodynamic and potentiostatic polarization. Very good passivation of the Al-Cr-Fe surface is exhibited from 1 M H2SO4 to 1 M NaOH solutions, which was confirmed by ICP-OES analysis over a period of 273 days. Potentiostatically formed passive films analysed by XPS revealed chromium enrichment in the outermost layer of the aluminium oxy-hydroxide film. Although Al-Cu-Fe-Cr showed passivation during potentiodynamic polarization, heavy active corrosion at OCP was revealed by ICP-OES. For the Al-Cu-Fe-Cr alloy, the 10% content of Cr is insufficient to maintain a protective "chemically stable" Cr oxide/hydroxide.
机译:通过恒电位和恒电位极化研究了Al-Cr-Fe和Al-Cu-Fe-Cr复合金属合金的腐蚀机理。从1 M H2SO4到1 M NaOH溶液显示出非常好的Al-Cr-Fe表面钝化,这通过273天的ICP-OES分析得到了证实。通过XPS分析的恒电位形成的钝化膜表明,羟基氧化铝膜的最外层富含铬。尽管Al-Cu-Fe-Cr在电位极化过程中表现出钝化作用,但ICP-OES在OCP处发现了严重的活性腐蚀。对于Al-Cu-Fe-Cr合金,Cr的10%含量不足以维持保护性的“化学上稳定的” Cr氧化物/氢氧化物。

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  • 来源
    《Corrosion science》 |2011年第5期|p.1825-1837|共13页
  • 作者单位

    Laboratory for Corrosion and Materials Integrity, EMPA Swiss Federal Laboratories for Materials Science and Technology, Ubertandstrasse 129, 8600 Dubendorf, Switzerland, Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland;

    Laboratory for Analytical Chemistry, EMPA Swiss Federal Laboratories for Science and Technology, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Analytical Chemistry, EMPA Swiss Federal Laboratories for Science and Technology, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Nanoscale Materials Science, EMPA Swiss Federal Laboratories for Materials Science and Technology, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Nanoscale Materials Science, EMPA Swiss Federal Laboratories for Materials Science and Technology, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Nanoscale Materials Science, EMPA Swiss Federal Laboratories for Materials Science and Technology, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Corrosion and Materials Integrity, EMPA Swiss Federal Laboratories for Materials Science and Technology, Ubertandstrasse 129, 8600 Dubendorf, Switzerland;

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

    A. Complex metallic Alloys; A. Aluminium alloys; B. Electrochemical polarization; B. ICP-MS; B. XPS; C. Passivity;

    机译:A.复杂金属合金;A。铝合金;B.电化学极化;B. ICP-MS;B。 XPS;C。被动性;

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