Abstract

Titanium and its alloys are used In orthopedic and dental implants due to their good corrosion resistance thanks to the passive native film and biological compatibility. Nevertheless, the increase in life expectancy being higher that the corrosion resistance of such thin layer, several treatments were developped. Among them, electrochemical TiO2 nanotubes allow to increase the corrosion resistance, overcome the bioinert nature of a flat surface that is not favorable for cell development, but suffer of a poor adhesion on Ti surface.The goal of this communication is to evaluate the corrosion performance as well as the adhesion properties of single and combined electrochemical treatments made on TA6V titanium alloy, including nanostructured (N), compact (C), and dual treated (NC) layers. The influence of potential used for the compact oxidation was evaluated on C and NC systems. The best potential from a corrosion point of view was determined to elaborate an optimal NC film. Given that the hydrophilicity is correlated with cellular adhesion and protein adsorption, water contact angle measurements were realized directly after the treatments and one month later. Since the surfaces became more hydrophobic by ageing, two different ways were tested to recover their initial hydrophilic behavior.

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