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Effect of Cu on the corrosion resistance and electrochemical response of a Ni-Co-Cr-Mo alloy in acidic chloride solution

机译：Cu对酸性氯化物溶液中Ni-Co-Cr-Mo合金耐蚀性和电化学响应的影响

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摘要

The effect of Cu addition varied from 0 to 4 mass% on the corrosion resistance and electrochemical response in Ni-Co-Cr-Mo alloys was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy, and Mott-Schottky analysis. Results indicate that the Ni-Co-Cr-Mo alloy with 2 mass% Cu exhibited the most superior corrosion resistance, and the presence of Cu greatly influenced the outer porous layer. The Ni-Co-Cr-Mo alloys' corrosion resistance was not simply increasing with copper addition increasing from 0 to 4 mass%. The X-ray photoelectron spectroscopy etching analysis was also conducted to illustrate the fraction of Cu at various depths in the passive film, and the results reveal that a maximum limit on Cu content (appropriately 3.10 mass%) existed in the outermost surface in the present condition. Among the studied alloys, the Ni-Co-Cr-Mo-2%Cu alloy formed the thickest passive film with the lowest donor density.
机译：使用电位动力学极化，电化学阻抗谱和Mott-Schottky分析研究了Cu添加量对Ni-Co-Cr-Mo合金的耐蚀性和电化学响应的影响，其添加量为0至4质量％。结果表明，具有2质量％Cu的Ni-Co-Cr-Mo合金表现出最优异的耐腐蚀性，并且Cu的存在极大地影响了外部多孔层。 Ni-Co-Cr-Mo合金的耐蚀性并没有随铜添加量从0到4质量％的增加而简单增加。还进行了X射线光电子能谱刻蚀分析，以说明钝化膜中不同深度的Cu含量，结果表明，目前最外层表面存在Cu含量的最大限制（约3.10质量％）。健康）状况。在研究的合金中，Ni-Co-Cr-Mo-2％Cu合金形成了最厚的钝化膜，而施主密度最低。

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  • 来源
    《Journal of Materials Research》 |2018年第22期|3801-3808|共8页
  • 作者

    Yang Biaobiao; Shi Chenying; Li Yunping; Lei Qian; Nie Yan;

  • 作者单位

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China;

    YuanMeng Precis Technol Shenzhen Inst, Shenzhen 518000, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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