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Effects of Mg content on pore structure and electrochemical corrosion behaviors of porous Al-Mg alloys

  • Materials, Metallurgy, Chemical and Environmental Engineering
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Abstract

Porous Al-Mg alloys with different nominal compositions were successfully fabricated via elemental powder reactive synthesis, and the phase composition, pore structure, and corrosion resistance were characterized with X-ray diffractometer, scanning electron microscope and electrochemical analyzer. The volume expansion ratio, open porosity and corrosion resistance in 3.5% (mass fraction) NaCl aqueous solution of the alloys increase at first and then decrease with the increase of Mg content. The maxima of volume expansion ratio and open porosity are 18.3% and 28.1% for the porous Al-56%Mg (mass fraction) alloy, while there is the best corrosion resistance for the porous Al-37.5% Mg (mass fraction) alloy. The pore formation mechanism can be explained by Kirkendall effect, and the corrosion resistance can be mainly affected by the phase composition for the porous Al-Mg alloys. They would be of the potential application for filtration in the chloride environment.

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Authors and Affiliations

  1. School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, China

    Wen-yuan He  (何文远), Yi-feng Xiao  (肖逸锋), Liang Wu  (吴靓), Yan-fei Xu  (许艳飞), Jin-wen Qian  (钱锦文) & Xue-jun Zheng  (郑学军)

  2. Key Laboratory of Welding Robot and Application Technology of Hunan Province, Xiangtan University, Xiangtan, 411105, China

    Wen-yuan He  (何文远), Yi-feng Xiao  (肖逸锋), Liang Wu  (吴靓), Yan-fei Xu  (许艳飞), Jin-wen Qian  (钱锦文) & Xue-jun Zheng  (郑学军)

  3. Engineering Research Center of Complex Trajectory Processing Technology and Equipment of Ministry of Education, Xiangtan University, Xiangtan, 411105, China

    Yi-feng Xiao  (肖逸锋), Yue-hui He  (贺跃辉) & Xue-jun Zheng  (郑学军)

  4. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Yue-hui He  (贺跃辉)

Authors
  1. Wen-yuan He  (何文远)
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  2. Yi-feng Xiao  (肖逸锋)
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  3. Liang Wu  (吴靓)
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  4. Yan-fei Xu  (许艳飞)
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  5. Jin-wen Qian  (钱锦文)
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  6. Yue-hui He  (贺跃辉)
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  7. Xue-jun Zheng  (郑学军)
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Corresponding authors

Correspondence to Yi-feng Xiao  (肖逸锋) or Xue-jun Zheng  (郑学军).

Additional information

Foundation item: Project(IRT_14R48) supported by the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China; Projects(51271158, 51272158, 51401175, 51504213) supported by the National Natural Science Foundation of China; Project([2009]17) supported by the Changjiang Scholar Incentive Program, China; Project(CX2015B224) supported by the Hunan Provincial Innovation Foundation for Postgraduate, China; Project(2015WK3021) supported by the Hunan Provincial Key Research Program, China

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He, Wy., Xiao, Yf., Wu, L. et al. Effects of Mg content on pore structure and electrochemical corrosion behaviors of porous Al-Mg alloys. J. Cent. South Univ. 23, 2483–2491 (2016). https://doi.org/10.1007/s11771-016-3307-6

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  • DOI: https://doi.org/10.1007/s11771-016-3307-6

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