A comparison of the corrosion behaviour and surface characteristics of vacuum-brazed and heat-treated Ti6Al4V alloy

被引:0
|
作者
T. M Lee
E Chang
C. Y Yang
机构
[1] National Cheng Kung University,Department of Materials Science and Engineering
[2] National Cheng Kung University Medical Centre,Department of Orthopaedics
来源
Journal of Materials Science: Materials in Medicine | 1998年 / 9卷
关键词
Auger; Auger Electron; Corrosion Test; Polarization Resistance; Corrosion Current Density;
D O I
暂无
中图分类号
学科分类号
摘要
The corrosion characteristics of the brazed Ti6Al4V specimens were analysed and compared with respect to the conventionally heat-treated specimens by an electrochemical corrosion test. The object of this research was to explore the potentiality of the brazed titanium for biomaterials. The characteristics of the 1300 °C heat-treated and the 970 °C brazed specimens, with passivation and sterilization treatment, were evaluated by measurement of corrosion potential, Ecorr, corrosion current densities, Icorr, polarization resistance of the reacted surface films, Rp, in a potentiodynamic test. The experimental results show that the corrosion rates of the heat-treated and the brazed samples are similar at Ecorr, and the value of Ecorr for the brazed sample is noble to the heat-treated samples. The passive current density of the brazed specimen is either lower or higher than the heat-treated specimen, depending on the polarization potential. By Auger electron spectroscopic and high-resolution X-ray photoelectron spectroscopic analysis on specimens from the potentiostatic test, the elements of copper and nickel in the brazing filler were not detected while less alumina was found in the reacted film of the brazed specimens when compared with the heat-treated specimens. The implication of the results is discussed.
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页码:429 / 437
页数:8
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