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Effect of Heat Treatment on Corrosion Performance of Mg-12Gd-3Y-1Sm-0.8Al Alloy

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Abstract

In this work, static mass analysis method and electrochemical test experiment were used to study the corrosion resistance of Mg-12Gd-3Y-1Sm-0.8Al alloy in different heat treatment states. Optical microscope, scanning electron microscope and x-ray diffractometer were used to analyze microstructure. The result shows: The microstructure of different samples are composed of α-Mg, Mg5Gd, Mg24Y5, Mg41Sm5 and Al2RE phases. Heat treatment can change the morphology and distribution of the precipitates, and the precipitates can affect the corrosion behavior as a cathode, thereby improving the corrosion resistance of the alloy in 3.5% NaCl solution. The relative corrosion rates of the different samples can be ranked as T6>T6-18h>T4>As-cast. After aging treatment, the fine and continuous precipitates act as a barrier to prevent the propagation of corrosion. At this time, the alloy has the strongest corrosion resistance.

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Acknowledgments

This project is sponsored by the National Natural Science Foundation of China (Nos. 51571084)

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China

    Ziyi Chen, Quanan Li, Xiaoya Chen, Hongxi Zhu, Qian Zhang & Jian Bao

  2. Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing Technology, Luoyang, 471023, China

    Quanan Li, Xiaoya Chen & Hongxi Zhu

  3. Luoyang Copper (Group) Co., LTD, Luoyang, 471023, China

    Xiangyu Li

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  1. Ziyi Chen
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Chen, Z., Li, Q., Chen, X. et al. Effect of Heat Treatment on Corrosion Performance of Mg-12Gd-3Y-1Sm-0.8Al Alloy. J. of Materi Eng and Perform 31, 2564–2574 (2022). https://doi.org/10.1007/s11665-021-06347-2

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