Sputtering power effect on the morphology, bio-corrosion properties of TiO2 coating on Ti6Al4V human body implant.

Wide applications of the uses of thin film technology are in medicine. It is used in artificial kidney dialysis and works to separate toxic substances harmful to the body, as well as an artificial lung where the blood is enriched with oxygen outside the body, and then returns to the patient's body. When it comes to corrosion resistance, titanium is at the top of the list. However, in certain harsh environments, it can be attacked by corrosion. This work enhances the corrosion resistance of medical Titanium alloy (Ti6Al4V) used to substitute natural bones and teeth. Using the reactive DC sputtering method from a titanium target in an argon/oxygen environment, thin coatings of TiO2 were produced on Ti6Al4V substrates in this study. Except for the applied power of the source, all synthesis parameters were held constant across all deposited coatings, including gas ratio, pressure, gas flow, and substrate distance. Researchers looked into how different sputtering powers impacted morphological and corrosion properties. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to examine the coatings' surface morphology, while energy dispersive X-ray (EDX) spectroscopy was used to evaluate their elemental chemical composition. In order to determine and compare the corrosion behavior of uncoated and TiO2 coated Ti6Al4V, electrochemical potentiodynamic polarization tests were performed in synthesized simulated body fluid (SBF)solution at 37±1 ◦C. Using 250 watts of power, the coating of sputtered TiO2 exhibited the maximum level of corrosion resistance. The results of this evaluation demonstrated a direct correlation between the applied power and the enhancement in corrosion resistance for specific grain size values. Corrosion resistance and biocompatibility of Ti6Al4V human body implants were shown to be improved after being coated with TiO2. [ABSTRACT FROM AUTHOR]