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Volume 24 Issue 4
Apr.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(4): 423-431
Shu-lun Gao, Mei Yu, Jian-hua Liu, Bing Xue,  and Song-mei Li, Effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solution, Int. J. Miner. Metall. Mater., 24(2017), No. 4, pp. 423-431. https://doi.org/10.1007/s12613-017-1423-4
Cite this article as:
Shu-lun Gao, Mei Yu, Jian-hua Liu, Bing Xue,  and Song-mei Li, Effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solution, Int. J. Miner. Metall. Mater., 24(2017), No. 4, pp. 423-431. https://doi.org/10.1007/s12613-017-1423-4
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研究论文

Effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solution

  • School of Materials Science and Engineering, Beihang University, Beijing 100191, China

  • 通讯作者:

    Mei Yu    E-mail: yumei@buaa.edu.cn

  • The effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solutions were studied by potentiodynamic polarization, electrochemical noise (EN), and complementary techniques including scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). A positive corrosion potential and increased corrosion current were observed due to the deposition of copper. The results demonstrate that the main corrosion type was pitting and the increasing cupric ion concentration augmented the pitting density. The pits became larger and deeper as a result of the embedment of copper into the surface of the alloy. Cupric ions were preferentially deposited at the defects around the secondary phase, leading to the formation of Al-Cu microgalvanic couples, which increased the corrosion rate. The corrosion rate gradually reached a stable value as the concentration of cupric ions was increased beyond 10 mmol/L.
    • Research Article

    Effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solution

    + Author Affiliations
      Abstract
    • The effects of cupric ions on the corrosion behavior of aluminum alloy 5A02 in ethylene glycol-water solutions were studied by potentiodynamic polarization, electrochemical noise (EN), and complementary techniques including scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). A positive corrosion potential and increased corrosion current were observed due to the deposition of copper. The results demonstrate that the main corrosion type was pitting and the increasing cupric ion concentration augmented the pitting density. The pits became larger and deeper as a result of the embedment of copper into the surface of the alloy. Cupric ions were preferentially deposited at the defects around the secondary phase, leading to the formation of Al-Cu microgalvanic couples, which increased the corrosion rate. The corrosion rate gradually reached a stable value as the concentration of cupric ions was increased beyond 10 mmol/L.
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