An Investigation on the Effect of Different Parameters on Titania Nanostructure Coating Prepared on 316L Stainless Steel by Sol-Gel Method

In this research the effect of heat treatment temperature, dispersant, pH of initial sol and withdrawal speed on microstructure of prepared anatase coating was studied. The uniform coating of TiO2 was prepared on 316L stainless steel by sol-gel method. In this process TiO2 stable sol was obtained by mixing of Tetra-η-Butyle Titanat, Ethyl Aceto Acetate and Ethanol. Optimized conditions to achieve uniform nanostructure coating have been examined by XRD and SEM tests. Results indicated that heat treatment in 400 °C resulted in anatase phase with 8.5 nm crystallite sizes. Dispersant addition in optimized amount promoted formation of a uniform film by prevention of agglomeration. By decreasing pH of sol, crystallite sizes were decreased. Increasing withdrawal speed affected the thickness of film directly.