The growth kinetics and protective properties of PEO-coatings on a biodegradable Mg-2%Sr alloy
Creators
- 1. Ufa State Aviation Technical University (USATU), 12 Karl Marx street, Ufa, 450008, Republic of Bashkortostan, Russia
- 2. The University of Manchester, Oxford Road, M13 9PL, Manchester, United Kingdom
Description
The growth kinetics of plasma electrolytic oxide coatings on a coarse grained and ultrafine-grained biodegradable Mg-2%Sr alloy was evaluated. Kinetic coefficients corresponding to the coating growth according to the dissolution-precipitation model were estimated depending on the alloy structure, and their correlation with the coating properties was demonstrated. The coating morphology and phase composition were correlated with protective properties studied using electrochemical tests on treated and untreated samples in Ringer's solution. Equivalent circuits for the systems «alloy-electrolyte» and «alloy-coating-electrolyte» were developed. It was shown that the PEO-coating obtained on the ultrafine-grained alloy has the best protective properties.
Files
EOM-55-5-article06.pdf
Files
(1.4 MB)
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