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Role of Microalloyed Y and Gd in Improving the Corrosion Resistance of Rolled Mg-3Al-1Zn Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The corrosion performances of rolled AZ31 alloy with addition of Y and Gd were comparatively investigated. The corrosion rates of AZ31 alloy modified with Y and Gd were 3.3 and 3.7 mm/y immersing for 24 h in 3.5 wt% NaCl solution, respectively, which were much lower than that of AZ31 alloy (23.6 mm/y). The remarkable improvement in corrosion performance by adding Y or Gd was ascribed to preferentially form less noble Al2Y or Al6GdMn6 and more protective corrosion product layer, resulting in the reduction in H2 evolution rate and the enhancement of passivity.

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Acknowledgements

This work was financially supported by the Fundamental Research Funds for the Central Universities (No. FRF-IC-20-10).

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Authors and Affiliations

  1. Shanghai Key Laboratory of Materials Laser Processing and Modification, and National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Panpan Wang & Jingchao Tao

  2. Institute of Engineering Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Haitao Jiang, Yujiao Wang & Yun Zhang

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  1. Panpan Wang
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  2. Haitao Jiang
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  3. Yujiao Wang
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  4. Yun Zhang
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Correspondence to Haitao Jiang or Jingchao Tao.

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Wang, P., Jiang, H., Wang, Y. et al. Role of Microalloyed Y and Gd in Improving the Corrosion Resistance of Rolled Mg-3Al-1Zn Alloy. Acta Metall. Sin. (Engl. Lett.) 35, 941–947 (2022). https://doi.org/10.1007/s40195-021-01332-z

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  • DOI: https://doi.org/10.1007/s40195-021-01332-z

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