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.
|Number of pages||14|
|Journal||Applied Surface Science|
|Early online date||3 Aug 2016|
|Publication status||Published - 15 Dec 2016|
- PEO coating