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

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • D. M. Lazarev
  • R. G. Farrakhov
  • V. R. Mukaeva
  • O. B. Kulyasova
  • E. V. Parfenov

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.

Bibliographical metadata

Original languageEnglish
Pages (from-to)83-92
JournalSurface Engineering and Applied Electrochemistry
Volume56
Issue number1
Early online date6 Apr 2020
DOIs
Publication statusPublished - 2020