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Growth Kinetics and Corrosion Protection Properties of Plasma Electrolytic Oxidation Coatings on Biodegradable Mg−2% Sr Alloy

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Abstract

The growth kinetics of plasma electrolytic oxidation coatings on biodegradable Mg−2% Sr alloy with coarse- and ultrafine-grain structures was evaluated. The parameters characterizing the coating growth kinetic were estimated for the alloys with different structures on the basis of a dissolution/deposition model, and their correlation with the coating properties was demonstrated. The coating morphology and phase composition were related to the protective properties of the alloys and investigated electrochemically in the Ringer’s solution, using uncoated and coated samples. Equivalent circuits modeling “alloy−electrolyte” and “alloy−coating−electrolyte” systems were developed. The PEO coating produced on the alloy with the ultra-fine grain structure displayed the best protective properties.

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Funding

This research is supported by Russian Science Foundation (project No. 17-79-10144).

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Authors and Affiliations

  1. Ufa State Aviation Technical University, 450008, Ufa, Bashkortostan, Russia

    D. M. Lazarev, R. G. Farrakhov, V. R. Mukaeva, O. B. Kulyasova & E. V. Parfenov

  2. University of Manchester, M13 9PL, Manchester, UK

    A. L. Yerokhin

Authors
  1. D. M. Lazarev
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  2. R. G. Farrakhov
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  3. V. R. Mukaeva
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  4. O. B. Kulyasova
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  5. E. V. Parfenov
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  6. A. L. Yerokhin
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Corresponding author

Correspondence to D. M. Lazarev.

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Translated by A. Kukharuk

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Lazarev, D.M., Farrakhov, R.G., Mukaeva, V.R. et al. Growth Kinetics and Corrosion Protection Properties of Plasma Electrolytic Oxidation Coatings on Biodegradable Mg−2% Sr Alloy. Surf. Engin. Appl.Electrochem. 56, 83–92 (2020). https://doi.org/10.3103/S1068375520010111

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  • DOI: https://doi.org/10.3103/S1068375520010111

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