Abstract
To improve the corrosion resistance of magnesium alloy as a medical implant, a Zr-containing micro-arc oxidation-polylactic acid (MAO-PLA) composite coating was successfully prepared. The microstructure, phase composition, and corrosion resistance of the coating were studied by scanning electron microscope, X-ray diffractometer, and electrochemical workstation. The results show that the micropores and cracks on the surface of MAO coating can be sealed by PLA, which makes the corrosion rate of the sealed sample minimum. And, in the process of immersion corrosion of simulated body fluid (SBF), calcium and phosphorus deposits are formed on the surface of the composite coating, and PLA coating plays a major role in protecting the substrate. The composite coating can be applied to degradable magnesium-based orthopedic implants.
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Acknowledgements
The author (Dr. Chen) is thankful to the National Natural Science Foundation of China (No 51774249) and the Open Fund (PLN2021-22) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University) for carrying out this research investigation.
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Chen, X.W., Cai, L.P., Zhang, D.F. et al. In Vitro Corrosion Behavior of Zr-Containing MAO-PLA Composite Coating on Magnesium Alloy. Trans Indian Inst Met 76, 2123–2130 (2023). https://doi.org/10.1007/s12666-023-02933-1
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DOI: https://doi.org/10.1007/s12666-023-02933-1