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Effect of neodymium on microstructure and corrosion resistance of AZ91 magnesium alloy

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Abstract

The corrosion behavior of a new Mg–9Al–1Zn (AZ91) magnesium alloy containing neodymium (Nd) is investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), immersion tests and electrochemical experiments. The results indicate that Nd decreases the size and volume fraction of the β (Mg17Al12) phase and forms Al2Nd in the alloy. In addition, during corrosion, Nd is incorporated into corrosion film in the form of Nd2O3. AZ91 alloy containing 1.0 wt.% Nd possesses an outstanding passivation property and excellent corrosion resistance. The corrosion resistance enhancement is attributed to the reduction in the size and volume fraction of the β phase and the incorporation of Nd2O3 in the corrosion film.

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Acknowledgements

This work was supported by The Program of Science and Technology Development in Jilin Province (No. 20040315) and “985 project” of Jilin University.

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Authors and Affiliations

  1. Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science & Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, PR China

    Y. L. Song, Yao Hui Liu, S. R. Yu, X. Y. Zhu & S. H. Wang

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  1. Y. L. Song
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  2. Yao Hui Liu
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  3. S. R. Yu
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  4. X. Y. Zhu
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  5. S. H. Wang
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Correspondence to Yao Hui Liu.

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Song, Y.L., Liu, Y.H., Yu, S.R. et al. Effect of neodymium on microstructure and corrosion resistance of AZ91 magnesium alloy. J Mater Sci 42, 4435–4440 (2007). https://doi.org/10.1007/s10853-006-0661-z

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  • DOI: https://doi.org/10.1007/s10853-006-0661-z

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