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Corrosion resistance of cerium conversion film electrodeposited on Mg-Gd-Y-Zr magnesium alloy

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Abstract

The cerium conversion film was applied to improving the corrosion resistance of Mg-Gd-Y-Zr magnesium alloy. The film was electrodeposited on the surface of the Mg-RE alloy in cerium nitrate solution. The compositions and morphologies were analyzed by X-ray diffraction(XRD), scanning election microscopy (SEM). The corrosion behaviors of the film were investigated electrochemical impedance spectroscopy (EIS), potentiodynamic polarization tests and immersion tests. The results show that the optimum parameters for electrochemical deposition are as follows: pH 10.0, time 30 min, 50 mmol/L Na2CO3 and temperature 25 °C by the designed experiments according to the orthogonal table L(9, 34). The corrosion protection efficiency is dependent on the deposition parameters. The cerium conversion film shows better corrosion protection behavior than chromate conversion film on Mg-Gd-Y-Zr magnesium alloy.

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Authors and Affiliations

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

    Jian-long Yi  (易建龙), Xin-ming Zhang  (张新明), Ming-an Chen  (陈明安), Rui Gu  (古 瑞) & Yun-lai Deng  (邓运来)

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  1. Jian-long Yi  (易建龙)
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  2. Xin-ming Zhang  (张新明)
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  3. Ming-an Chen  (陈明安)
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  4. Rui Gu  (古 瑞)
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  5. Yun-lai Deng  (邓运来)
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Corresponding author

Correspondence to Xin-ming Zhang  (张新明).

Additional information

Foundation item: Project (5133001E) supported by the Major State Basic Research and Development Program of China

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Yi, Jl., Zhang, Xm., Chen, Ma. et al. Corrosion resistance of cerium conversion film electrodeposited on Mg-Gd-Y-Zr magnesium alloy. J. Cent. South Univ. Technol. 16, 38–42 (2009). https://doi.org/10.1007/s11771-009-0006-6

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  • DOI: https://doi.org/10.1007/s11771-009-0006-6

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