Abstract

DORADO-BUSTAMANTE, Kevin; ZULUAGA-DIAZ, Benjamín  and  ESTUPINAN-DURAN, Hugo. Bioactivity analysis of the AZ31 Mg alloy coated by PEO (Plasma Electrolytic oxidation). Dyna rev.fac.nac.minas [online]. 2018, vol.85, n.205, pp.328-337. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v85n205.69573.

Magnesium is a material that presents favorable properties for its selection as biomaterial; however, its application is restricted by the rapid corrosion. In this research was evaluated the surface modification of magnesium AZ31 by PEO and its effect on the protective and bioactive properties. The microstructure, phase composition and distribution of elements in the coating were characterized by SEM, XRD and EDX. Chemical stability, corrosion resistance, the bioactivity and electronic properties were evaluated using EIS and Mott-Schottky in simulated body fluid. The analysis of XRD and EDX indicated the presence of MgO, MgSiO4 in the coatings. The cross section analysis present a compact layer close to the substrate followed by an outer porous layer. EIS analysis showed that treatment increased the substrate protection in a simulated physiological medium.

Keywords : anodized; coating; corrosion; biocompatibility; biomaterial.

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