The hydrothermal treated Zn-incorporated titania based microarc oxidation coating: Surface characteristics, apatite-inducing ability and antibacterial ability

In this work, the MAO-Zn coatings were further modified by hydrothermal treatment in the deionized water and 5 mol/L NH3
- H2O solution. The surface structure and the release behavior of Zn element in the hydrothermal treated MAO-Zn coatings have been effectively optimized. In addition, the antibacterial ability of MAO-Zn coatings after hydrothermal treatment have been significantly improved.514(a) the SEM image of MAO-Zn coating; (b) the SEM image of MAO-Zn-HT-0 coating; (c) the SEM image of MAO-Zn-HT coating; (d) the Zn2+ release curves of MAO-Zn, MAO-Zn-HT-0 and MAO-Zn-HT-5 coatings; (e) the Zn2+ release rates from the MAO-Zn, MAO-Zn-HT-0 and MAO-Zn-HT-5 coatings; (f) the antibacterial rates of the MAO-Zn, MAO-Zn-HT-0 and MAO-Zn-HT-5 coatings; (g) The schematic illustration of antibacterial mechanism of the hydrothermal treated Zn-incorporated MAO coating.