Improved protective properties of Mg alloy AZ31 using bis-[triethoxysilylpropyl] tetrasulfide silane films modified with nano TiO 2 by electrochemically assisted deposition

Magnesium (Mg) and its alloys were favored by biomedical practitioners thanks to availability of bioactivity and degradability. However, the mismatch between the degradation properties of Mg alloys and the rate of osteogenesis often led to implant failure and bacterial infections within the desired period. The goal of this study was to improve the corrosion resistance of Mg alloys, providing theoretical guidance for solving the problems of implantable Mg-based materials. In this experiment, we prepared a dense and uniform BTESPT/TiO film layer on the surface of Mg substrate by electrochemically assisted deposition. The BTESPT/TiO film layer provided a physical barrier to avoid direct contact between AZ31 and the corrosive medium. When the addition amount was 2 g/L TiO , the coating had the best corrosion resistance behavior, its corrosion current density could be up to 9.973×10 A/cm . The BTESPT/TiO revealed good cell viability as well as osteogenic differentiation potential on MC3T3-E1 cells.