Bioactive plasma electrolytic oxidation coatings on aluminium-free magnesium alloys

摘要

The present work reports on PEO coatings which can be potentially used for degradation control of Mg-based implant materials. PEO coatings were developed on aluminium free-magnesium alloys (Mg-Ca and Mg-Ca-Ag) using electrolytes containing Ca and P to produce bioactive coatings. Uncoated and coated materials were examined in terms of structure and morphology using TEM, SEM and XRD. The corrosion investigations were performed using electrochemical studies and hydrogen evolution measurements and revealed that PEO coatings improved the corrosion resistance of the bulk materials Preliminary biological studies (e.g., LIVE/DEAD - Viability/Cytotoxicity assays) highlighted an increase material surface colonization with PEO-coating and a good cytocompatibility.