Corrosion behaviour of Ti-Nb-Sn shape memory alloys in different simulated body solutions
Corrosion behaviour of Ti-Nb-Sn shape memory alloys in different simulated body solutions
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DOI：
10.1016/j.msea.2006.01.131
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发表时间：
2006-12-25
期刊：
影响因子：
6.4
通讯作者：
Zhao, L. C.
中科院分区：
文献类型：
--
作者：
Zheng, Y. F.;Wang, B. L.;Zhao, L. C.
采用开路电位（OCP）、Tafel和阳极极化技术研究了Ti-Nb-Sn合金在37℃下不同pH值（2.4、5.4、7.4）的0.9% NaCl生理溶液和Hank’s溶液中的耐蚀性。用x射线光电子能谱（XPS）分析了钝化膜的组成。Ti-Nb-Sn合金的OCP在Hank's溶液中几个小时内趋于稳定，但在0.9% NaCl溶液中继续升高。Tafel结果表明，腐蚀电流密度在1 μ A/cm(2)以下。阳极极化曲线显示出较宽的无源区。XPS分析结果表明，钝化膜主要由TiO2、Nb2O5和SnO2组成。这些观察结果表明，Ti-Nb-Sn合金具有很大的生物医学应用潜力。(c) 2006 Elsevier B.V.版权所有
The corrosion resistance of Ti-Nb-Sn alloys in the 0.9% NaCl physiological and Hank's solutions with different pH values (2.4, 5.4, 7.4) at 37 degrees C were investigated by means of open circuit potential (OCP), Tafel and anodic polarization techniques. The compositions of the passive films were analysed by X-ray photoelectron spectroscopy (XPS). The OCP was found to stabilize within several hours for Ti-Nb-Sn alloys in the Hank's solution but continued to increase in the 0.9% NaCl solution. Tafel results indicated that the corrosion current densities were in the magnitude of below 1 mu A/cm(2). Anodic polarization curves demonstrated a wide passive region. XPS analysis results revealed that the passive film mainly consisted of TiO2, Nb2O5 and SnO2. These observations suggest that Ti-Nb-Sn alloys have a large potential for biomedical applications. (c) 2006 Elsevier B.V. All rights reserved.