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Abstract <p>Magnesium alloys have found extensive applications in industry due to their low density, exceptional strength-to-weight ratio and high damping capacity. Those bio-compatible alloys have been used as a versatile material for permanent implants in the body. High affinity for corrosion and subsequent degradation in the presence of corrosive anions require surface modification methods over these alloys. Anti-corrosion and wear-resistant plasma electrolytic oxidation (PEO) coatings on magnesium alloys are more cost-effective and environmentally friendly among various surface treatment methods. The surface characteristics, wear, and corrosion resistance of the sample can be improved with the addition of various micro/nano-particles or additives to the electrolyte. The effect of various PEO process parameters on the coating characteristics is further discussed in this review paper. The mechanisms underlying corrosion inhibition and the degradation of those coatings in the presence of corrosive environments are elaborated in this work.</p>

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Effect of Particle Inclusions, Electrolyte Additives and Process Parameters on PEO-Coated Mg Alloys—A Review

  • 期刊论文

  • 发表日期：

    2025年10月22日

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  • M. Madhu,
  • S. Manivannan,
  • D. Sreekanth,
  • M. Arunkumar,
  • P. Sajeesh

摘要

Abstract

Magnesium alloys have found extensive applications in industry due to their low density, exceptional strength-to-weight ratio and high damping capacity. Those bio-compatible alloys have been used as a versatile material for permanent implants in the body. High affinity for corrosion and subsequent degradation in the presence of corrosive anions require surface modification methods over these alloys. Anti-corrosion and wear-resistant plasma electrolytic oxidation (PEO) coatings on magnesium alloys are more cost-effective and environmentally friendly among various surface treatment methods. The surface characteristics, wear, and corrosion resistance of the sample can be improved with the addition of various micro/nano-particles or additives to the electrolyte. The effect of various PEO process parameters on the coating characteristics is further discussed in this review paper. The mechanisms underlying corrosion inhibition and the degradation of those coatings in the presence of corrosive environments are elaborated in this work.