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Lower temperature aluminizing and its effect on improving corrosion resistance of iron treated by surface mechanical attrition treatment

机译：表面机械磨损处理的低温渗铝及其对铁的耐蚀性的提高作用

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摘要

An ultrafine-grained surface layer with the average grain size of about 28 nm in the surface layer was fabricated on a pure Fe plate by the surface mechanical attrition treatment (SMAT). Lower temperature aluminizing treatments of the SMAT samples were investigated by scanning electron microscope and X-ray energy dispersive spectroscope. The electrochemical corrosion behavior of the aluminized SMAT sample was studied in 0.05 mol/L Na_2SO_4 + 0.05 mol/L H_2SO_4 solution, in comparison with the original SMAT and the coarse-grained sample. The results showed that SMAT had a negative effect on the corrosion resistance of Fe. An aluminized surface layer was formed on SMAT sample by aluminizing treatment at 400℃, which was much lower than that of the conventional aluminizing treatment. A successive lower temperature aluminizing process made the aluminized layer thicker and continuous. The SMAT sample treated by a successive lower temperature aluminizing had much higher corrosion resistance and exhibited passive behavior, which was due to the formation of a protective passive film.
机译：通过表面机械磨损处理（SMAT），在纯铁板上制造了表面层中平均晶粒尺寸约为28nm的超细颗粒表面层。通过扫描电子显微镜和X射线能谱仪研究了SMAT样品的低温渗铝处理。与原始SMAT和粗颗粒样品相比，研究了渗铝SMAT样品在0.05 mol / L Na_2SO_4 + 0.05 mol / L H_2SO_4溶液中的电化学腐蚀行为。结果表明，SMAT对Fe的耐蚀性有负面影响。通过400℃的渗铝处理在SMAT样品上形成渗铝表面层，远低于常规渗铝处理。连续的较低温度的渗铝工艺使渗铝层更厚且连续。经过连续较低温度渗铝处理的SMAT样品具有更高的耐腐蚀性，并表现出钝化行为，这是由于形成了保护性钝化膜。

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  • 来源
    《JCT》 |2011年第1期|p.107-116|共10页
  • 作者

    Cheng Zhong; Wenbin Hu; Yiming Jiang; Bo Deng; Jin Li;

  • 作者单位

    State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University, 800 Dongchuan Road,Shanghai 200240, China;

    State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University, 800 Dongchuan Road,Shanghai 200240, China;

    Department of Materials Science, Fudan University,220 Handan Road, Shanghai 200433, China;

    Department of Materials Science, Fudan University,220 Handan Road, Shanghai 200433, China;

    Department of Materials Science, Fudan University,220 Handan Road, Shanghai 200433, China;

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  • 正文语种 eng
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  • 关键词

    surface mechanical attrition treatment; nanocrystalline materials; lower temperature aluminizing; corrosion resistance;

    机译：表面机械磨损处理;纳米晶体材料;较低温度的渗铝;耐腐蚀性能;

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