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<p>Magnesium–lithium (Mg–Li) alloys are lightweight metallic materials with great potential for structural applications; however, their low corrosion resistance remains a critical limitation. In this study, micro arc oxidation (MAO) coatings were applied to Mg–8Li alloys to investigate the effect of nano-sized Al<sub>2</sub>O<sub>3</sub> particle additions on corrosion resistance. The incorporation of nanoparticles into the MAO coatings modified the surface pore structure and enhanced the protective performance. Electrochemical tests showed that the polarization resistance increased significantly from 59.4 Ω·cm<sup>2</sup> (undoped) to 5672.5 Ω·cm<sup>2</sup> (Al<sub>2</sub>O<sub>3</sub>-doped). These results demonstrate that nano-Al<sub>2</sub>O<sub>3</sub> incorporation can effectively improve the corrosion resistance of MAO-coated Mg–Li alloys, offering valuable insights for future protective strategies.</p>

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Effect of nano-Al2O3 additive on the structure and corrosion resistance of micro arc oxidation processed Mg–8Li alloy

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • Aysun Ayday,
  • Mustafa Durmaz,
  • Şehzat AÇIKGÖZ,
  • S Can Kurnaz

摘要

Magnesium–lithium (Mg–Li) alloys are lightweight metallic materials with great potential for structural applications; however, their low corrosion resistance remains a critical limitation. In this study, micro arc oxidation (MAO) coatings were applied to Mg–8Li alloys to investigate the effect of nano-sized Al2O3 particle additions on corrosion resistance. The incorporation of nanoparticles into the MAO coatings modified the surface pore structure and enhanced the protective performance. Electrochemical tests showed that the polarization resistance increased significantly from 59.4 Ω·cm2 (undoped) to 5672.5 Ω·cm2 (Al2O3-doped). These results demonstrate that nano-Al2O3 incorporation can effectively improve the corrosion resistance of MAO-coated Mg–Li alloys, offering valuable insights for future protective strategies.