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<p>Magnesium alloys have a wide range of application prospects in the field of medical implantation due to their excellent biocompatibility, human bone-matching elastic modulus, and biodegradability. However, magnesium alloys have the poor corrosion resistance because of the active chemical nature which limits their application in the field of implantation. It is important to find ways to stabilize and improve the corrosion resistance of magnesium alloys. Micro-arc oxidation (MAO), as a surface modification method, has received widespread attention due to its low equipment cost and relatively simple operational process. This paper summarizes the current research progress in enhancing the performance of MAO coatings for biomedical magnesium alloys. It focuses on analyzing the effects of alloy surface pretreatment, electrolyte composition and concentration, particle additives, process parameters, post-coating treatments, as well as self-sealing and self-healing properties on the performance of MAO coatings. The future development of MAO coatings for Magnesium alloys is also discussed.</p> Graphical Abstract <p></p>

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State-of-the-Art Review on Improving the Performance of Micro-Arc Oxidation Coatings of Biomedical Magnesium Alloys

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Hao Chen,
  • Bin Fang,
  • Junjun Pai,
  • Lei Li,
  • Enguang Xue,
  • Chengzhen Du,
  • Guosheng Su

摘要

Magnesium alloys have a wide range of application prospects in the field of medical implantation due to their excellent biocompatibility, human bone-matching elastic modulus, and biodegradability. However, magnesium alloys have the poor corrosion resistance because of the active chemical nature which limits their application in the field of implantation. It is important to find ways to stabilize and improve the corrosion resistance of magnesium alloys. Micro-arc oxidation (MAO), as a surface modification method, has received widespread attention due to its low equipment cost and relatively simple operational process. This paper summarizes the current research progress in enhancing the performance of MAO coatings for biomedical magnesium alloys. It focuses on analyzing the effects of alloy surface pretreatment, electrolyte composition and concentration, particle additives, process parameters, post-coating treatments, as well as self-sealing and self-healing properties on the performance of MAO coatings. The future development of MAO coatings for Magnesium alloys is also discussed.

Graphical Abstract