Corrosion Behavior of Biomedical Ti-24Nb-4Zr-8Sn Alloy in Saline Medium
The corrosion behavior of Ti-24Nb-4Zr-8Sn multifunctional biomedical titanium alloy was investigated in a 0. 9％ NaCl saline solution at 37℃ by utilizing the open-circuit potential, the potentiodynamic polarization and the electrochemical impedance spectroscopy (EIS) techniques, and the results were compared with the pure titanium and Ti6Al-4V alloy,which have been applied widely in orthopedic implants. The results showed that they were passivated spontaneously once immersion in 0. 9％ NaCl solution due to the formation of protective passive films. The potentiodynamic polarization curves showed a relative wider passive region and a low corrosion current density for Ti-24Nb-4Zr-8Sn alloy,which was comparable to that of pure titanium. The EIS results support the formation of a single passive layer on the Ti-24Nb-4Zr-8Sn alloy and pure titanium after immersion into 0. 9％NaCl solution but a two-layer oxide film on the Ti-6Al-4V alloy composing an inner barrier layer and an outer porous layer.
Tir24Nb-4Zr-8Sn alloy corrosion saline solution
Yun Bai Shujun Li Yulin Hao Rui Yang
Shenyang National laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
2184-2188
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）