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Effects of Cerium and Lanthanum on the Corrosion Behavior of Al-3.0 wt.%Mg Alloy

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Abstract

Effects of rare earth elements (RE: cerium and lanthanum) on the corrosion behavior of Al-3.0 wt.%Mg alloy were investigated by electrochemical measurement and immersion test in 3.5 wt.% NaCl solution. The results indicated that a proper amount of rare earth (about 0.2 wt.%) could improve the corrosion resistance of Al-3.0 wt.%Mg alloy effectively, whereas that excessive rare earth addition would increase the corrosion rate and reduce the corrosion resistance. The corrosion behavior of Al-3.0 wt.%Mg alloys in 3.5 wt.% NaCl solution showed typical characteristics of pitting corrosion at the position of second phases. The more and the bigger the second phases, the more and the larger the pitting holes.

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Acknowledgment

The authors acknowledge the financial support of the research was supported by the Fundamental Research Funds for the Central Universities (2014B31714).

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Authors and Affiliations

  1. College of Mechanics and Materials, Hohai University, Nanjing, 210098, China

    Xin Zhang, Zehua Wang & Zehua Zhou

  2. Zhangjiagang Hongji Aluminum Co. Ltd., 18 Dosan Road, Suzhou, 215600, China

    Jianming Xu

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  1. Xin Zhang
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  2. Zehua Wang
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  3. Zehua Zhou
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Correspondence to Xin Zhang or Zehua Wang.

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Zhang, X., Wang, Z., Zhou, Z. et al. Effects of Cerium and Lanthanum on the Corrosion Behavior of Al-3.0 wt.%Mg Alloy. J. of Materi Eng and Perform 25, 1122–1128 (2016). https://doi.org/10.1007/s11665-016-1948-0

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  • DOI: https://doi.org/10.1007/s11665-016-1948-0

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