Abstract
The poor corrosion resistance of magnesium alloy limits its applications. The preparation of superhydrophobic coating on its surface can effectively improve the corrosion resistance, and the self-cleaning performance of superhydrophobic coating can also enhance the anti-fouling performance of magnesium alloy. In this study, the flake superhydrophobic hydroxyapatite (HA) coating with micro-nano scale was prepared on the magnesium alloy surface by electrodeposition, chemical immersion and stearic acid low-energy modification. The measured water contact angle on the coating surface was 160.21° and the sliding angle was 2.5°. The stability tests indicated that the coating has excellent high-temperature resistance and mechanical stability, which opened up the possibility of high-temperature service. The electrochemical test showed that the superhydrophobic HA coating significantly enhanced the corrosion resistance of the magnesium alloy. The effectiveness of the corrosion inhibition was up to 99%, which provided a protective shield for the substrate. This work expects to further broaden the application field of magnesium alloys.
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Acknowledgements
This work was supported by the Natural Science Foundation of Shandong Province of China (No. ZR2019MEM020) and the Project of Jilin Province Development and Reform Commission (No. 2021C039-5).
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Bi, Y., Xiong, W., Li, Z. et al. Preparation of Superhydrophobic Hydroxyapatite Coating on AZ31B Magnesium Alloy with Self-Cleaning Anti-Corrosion Properties and Excellent Stability. Met. Mater. Int. 30, 667–681 (2024). https://doi.org/10.1007/s12540-023-01529-0
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DOI: https://doi.org/10.1007/s12540-023-01529-0