Effect of surface nanocrystallization on the corrosion behavior of Ti-6Al-4V titanium alloy

摘要

By means of surface mechanical attrition treatment (SMAT), a nanocrystalline surface layer was formed on a Ti-6Al-4V alloy. The corrosion behavior of Ti-6Al-4V in a Ringer's solution was investigated by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) measurements. Overall results of all studies identified beneficial impacts of SMAT on corrosion behavior of Ti-6Al-4V alloy. The surface oxide film formed on Ti-6Al-4V and its stability in biological environments play a decisive role for the biocompatibility of implants. In this study, passive oxide films formed on Ti-6Al-4V surfaces and their natural growth in a Ringer's solution have been investigated by microhardness and X-ray photoelectron spectroscopy (XPS).