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<p>Micro-arc oxidation (MAO) is gaining increasing attention as an effective technology to improve the corrosion resistance of Mg alloys through surface coating. However, the porous structure of these coatings limits the application of Mg alloys in corrosion resistance. This paper investigates the effect of introducing CO<sub>2</sub> into the electrolyte on the corrosion resistance of the surface coatings. SEM, XRD, FT-IR, and XPS were employed for micro-morphology and elemental analysis. The corrosion resistance of the different film layers was measured using an electrochemical workstation. The results indicate that introducing CO<sub>2</sub> gas promotes the growth of the coatings, which in turn enhances the corrosion resistance of Mg alloys. This study not only innovatively explores the impact of gases on MAO but also expands the potential applications of Mg alloys in corrosion prevention.</p>

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Effect of CO2 Gas on the Corrosion Resistance of Mg Alloy Coatings Prepared by Micro-arc Oxidation

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Yingjie Wang,
  • Lang Yu,
  • Zhe Li,
  • Bocheng Zhao,
  • Yaning Pang,
  • Binglong Jiao,
  • Yaokun Pan,
  • Hui Peng

摘要

Micro-arc oxidation (MAO) is gaining increasing attention as an effective technology to improve the corrosion resistance of Mg alloys through surface coating. However, the porous structure of these coatings limits the application of Mg alloys in corrosion resistance. This paper investigates the effect of introducing CO2 into the electrolyte on the corrosion resistance of the surface coatings. SEM, XRD, FT-IR, and XPS were employed for micro-morphology and elemental analysis. The corrosion resistance of the different film layers was measured using an electrochemical workstation. The results indicate that introducing CO2 gas promotes the growth of the coatings, which in turn enhances the corrosion resistance of Mg alloys. This study not only innovatively explores the impact of gases on MAO but also expands the potential applications of Mg alloys in corrosion prevention.