Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys |
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| Affiliation: | 1. Department of Metallurgical and Materials Enginneering, Indian Institute of Technology Madras, Chennai, India;2. School of Mechanical and Building Sciences, Vellore Institute of Technology, Chennai, India;1. Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;2. Department of Spinal Surgery, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China;3. Engineering Materials group, University of Southampton, Southampton SO17 1BJ, UK;4. Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China |
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| Abstract: | The electrochemical behaviour of the Ti–13Nb–13Zr and Ti–6Al–4V ELI alloys with martensitic microstructures was investigated by polarization and electrochemical impedance spectroscopy (EIS) in Ringer’s solution. The impedance spectra were interpreted by a two time-constants equivalent circuit. Both investigated alloys showed high corrosion resistance, but the thin and uniform passive film on the Ti–6Al–4V ELI alloy surface was more protective. The inner barrier and outer porous layer were highly resistant and capacitive. However, thicker and more porous passive film on the Ti–13Nb–13Zr alloy surface may be beneficial for osteointegration. The suitable thermomechanical processing improved the corrosion resistance of Ti–13Nb–13Zr alloy. |
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| Keywords: | A Titanium A Alloys B XRD C Passive films B Polarization B EIS |
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