Comparison of surface modification and corrosion resistance of Ti6Al4V alloy using matcha tea extract-based silver and copper oxide nanoparticles

In this study, our aim was to investigate the application of green-synthesized silver nanoparticles (Ag NPs) and copper oxide nanoparticles (CuO NPs) for surface modification, specifically focusing on their influence on the corrosion properties of Ti6Al4V alloy. The green NPs were thoroughly characterized, and their role in enhancing the anticorrosive performance of Ti6Al4V was carefully evaluated. Various coating methods and drying temperatures were utilized to coat Ti6Al4V samples with the NPs, aiming to assess their impact on corrosion resistance. The electrochemical corrosion behavior was examined through electrochemical polarization tests in Ringer's bio-liquid. The study underscored the significant impact of coating type, coating method, and drying temperature (25 °C and 60 °C) in achieving favorable anticorrosive performance. Notably, samples oven-dried at both temperatures and coated with Ag NPs and CuO NPs using spray coating demonstrated the most effective substrate protection, achieving protection efficiencies of 97.37 % and 90.56 %, respectively. This outcome can be attributed to the unique spherical and homogeneously dispersed particulate structure of the NPs, effectively reducing microporosity. In summary, the combination of increased surface area and reduced microporosity resulting from the surface properties of the NPs underscores the potential of well-designed surface modification approaches in advancing the development of titanium-based implants for biomedical applications.