Improving the Surface Properties of Ti-10Zr Biomedical Alloy by Controlled Electrochemical Oxidation to form a Thin Nanoporous Oxide Film

Lidia BENEA, Valentin Marian DUMITRAŞCU,  Pierre PONTHIAUX

1 Competences Center: Interfaces – Tribocorrosion and Electrochemical Systems, Faculty of Engineering, Dunarea de Jos University, Galati, Romania,
2 Laboratoire Génie des Procédés Matériaux, Ecole Centrale Paris, F–92290 Châtenay-Malabry, Paris, France.

The research work presents a comparative investigation of untreated Ti-10Zr alloy surface and porous anodic oxide film formed on Ti-10Zr biomedical alloy to determine the corrosion and tribocorrosion performances in physiological solution. The in situ electrochemical technique used for investigation of tribo-electrochemical degradation was the open circuit potential (OCP) measurement performed before, during and after sliding tests. The results show that controlled anodic oxidation techniques applied can significantly enhance the tribo-electrochemical performances of Ti–10Zr alloy surface for biomedical applications.
Considering that most implants are subjected to corrosion by body fluids and to mechanical stress due to motion, the scientific contribution of the present research work is fairly important.
Better corrosion resistance and low friction coefficient was obtained for anodized formed porous thin TiO2–ZrO2 film than that of the untreated Ti–10Zr surface. This behavior confirms the contribution of the present work by the controlled anodic oxidation method to improve the wear and corrosion properties of Ti–10Zr alloy in the presence of a biological environment.

UEFISCDI - Ministry of Education and Research is acknowledged for the financial support to Competences Centre Interfaces - Tribocorrosion and Electrochemical Systems (CC-ITES) - Dunarea de Jos University of Galati - Research Project: HyBioElect, contract 10 /30-08-2013 (2013 - 2016) in the frame of National Research Programme Romania - PN II PCE.

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