Role of PEO coatings in long-term biodegradation of a Mg alloy

E. Matykina, I. Garcia, R. Arrabal, M. Mohedano, B. Mingo, J. Sancho, M. C. Merino, A. Pardo

    Research output: Contribution to journalArticlepeer-review


    Long-term effect of plasma electrolytic oxidation (PEO) coatings on in vitro corrosion of 3D Mg implant specimens has been investigated in simulated body fluid (SBF). Hydrogen evolution rate in PEO-coated specimens was 35 times lower compared to the non-coated alloy during first 2 weeks of immersion (0.04–0.07 mL cm−2 d−1) and reached a steady-state rate of 0.3 mL cm−2 d−1 by week 6 of immersion. Studies of the tribocorrosion behaviour of the PEO-coated alloy disclosed that the coatings rapidly lose their tribocorrosion resistance due to hydration of the coating material and associated drastic decrease of microhardness but exhibit a better tirbocorrosion performance than the non-coated material.

    Original languageEnglish
    Pages (from-to)810-823
    Number of pages14
    JournalApplied Surface Science
    Early online date3 Aug 2016
    Publication statusPublished - 15 Dec 2016


    • Characterization
    • Corrosion
    • Magnesium
    • PEO coating
    • Wear


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