Effect of chitosan–tungsten composite coating obtained by electrophoretic deposition on the corrosion resistance of Ni–Ti alloy in physiological medium

Ni–Ti shape memory alloys (Nitinol) are suitable for biomedical applications such as orthodontic, orthopedic, and cardiovascular implants. However, to avoid local inflammatory processes, efforts being made functionalize the surface of alloy with bioactive materials. Chitosan-based composite coatings can be applied improve properties due their excellent properties, low toxicity, biocompatibility, biodegradability, good film-forming ability. In this work, chitosan–tungsten (Chit–W) was evaluated a protective coating in physiological medium (Ringer's solution). The results morphology chemical composition (SEM EDX) confirmed formation formed by chitosan matrix impregnated tungsten oxide nanoparticles. Corrosion resistance proved efficiency coating, acting barrier between substrate (Ni–Ti) corrosive environment. Therefore, point possible system candidate (Ni–Ti coated Chit–W composite) orthopedic