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New anodizing process for magnesium alloys

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Abstract

Compact anodic films with high hardness and good corrosion resistance on magnesium alloys were prepared by a new constant voltage and arc-free anodizing process. The effects of anodizing parameters such as applied voltage and electrolyte temperature on the peak current density and the thickness of films were investigated. In addition, the morphologies and corrosion resistance of films were investigated by scanning electron microscopy and potentiodynamic polarization, respectively. The results show that the higher the applied voltage, the higher the peak intense sparking which may deteriorate the properties of the anodic films and bring about unsafety. The new anodizing process can be applied in a wide range of temperature. The new anodic films have numbers of pores with the diameter of 0.5–5.0 µm which do not transverse the entire film.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, 410083, Changsha, China

    Luo Sheng-lian & Chai Li-yuan

  2. School of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, China

    Luo Sheng-lian, Dai Lei, Zhou Hai-hui & Kuang Ya-fei (Professor)

Authors
  1. Luo Sheng-lian
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  2. Dai Lei
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  3. Zhou Hai-hui
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  4. Chai Li-yuan
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  5. Kuang Ya-fei
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Corresponding author

Correspondence to Kuang Ya-fei.

Additional information

Foundation item: Project (2002107) supported by the Natural Science Foundation of Hunan Province; project(2005-241) supported by the Science Project of Changsha

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Luo, Sl., Dai, L., Zhou, Hh. et al. New anodizing process for magnesium alloys. J Cent. South Univ. Technol. 13, 141–145 (2006). https://doi.org/10.1007/s11771-006-0145-y

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  • DOI: https://doi.org/10.1007/s11771-006-0145-y

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