Corrosion behaviors of a new titanium alloy TZNT for surgical implant application in Ringer’s solution
来源期刊：Rare Metals2010年第1期
论文作者：LI Juna, ZHOU Lianb, and LI Zuochenb a School of Materials Engineering, Shanghai University of Engineering Science, Shanghai , China b Northwest Institute for Nonferrous Metal Research, Xi’an , China
文章页码：37 - 44
摘 要：A new near α-titanium alloy Ti12.5Zr2.5Nb2.5Ta （TZNT） for surgical implants was designed. The potentiodynamic technique was performed to investigate the corrosion behaviors of TZNT in Ringer’s solution, and Ti6Al4V, Ti6Al7Nb, and TA2 were taken as comparison. The structure of the passive film was analyzed using an X-ray photoelectron spectrometer （XPS）. The results indicate that TZNT possesses better corrosion resistance, when compared with Ti6Al4V, Ti6Al7Nb, and TA2. The passive film formed on the TZNT surface is composed of oxides, such as TiO2, ZrO2, Nb2O5, and Ta2O5. The elements Zr and Ta are rich, whereas Ti and Nb are poor in the passive film. The addi-tion of Zr, Nb, and Ta with relatively low electrochemical reaction potentials can reduce the anode activity and improve passive properties. Other than that, oxides such as ZrO2, Nb2O5, and Ta2O5 with the nobler equilibrium constants make the passive film more stable.
LI Juna, ZHOU Lianb, and LI Zuochenb a School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China b Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
摘 要：A new near α-titanium alloy Ti12.5Zr2.5Nb2.5Ta （TZNT） for surgical implants was designed. The potentiodynamic technique was performed to investigate the corrosion behaviors of TZNT in Ringer’s solution, and Ti6Al4V, Ti6Al7Nb, and TA2 were taken as comparison. The structure of the passive film was analyzed using an X-ray photoelectron spectrometer （XPS）. The results indicate that TZNT possesses better corrosion resistance, when compared with Ti6Al4V, Ti6Al7Nb, and TA2. The passive film formed on the TZNT surface is composed of oxides, such as TiO2, ZrO2, Nb2O5, and Ta2O5. The elements Zr and Ta are rich, whereas Ti and Nb are poor in the passive film. The addi-tion of Zr, Nb, and Ta with relatively low electrochemical reaction potentials can reduce the anode activity and improve passive properties. Other than that, oxides such as ZrO2, Nb2O5, and Ta2O5 with the nobler equilibrium constants make the passive film more stable.
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