Corrosion behavior and microstructures of experimental Ti-Au alloys

被引:40
|
作者
Takahashi, M
Kikuchi, M
Takada, Y
Okuno, O
Okabe, T
机构
[1] Tohoku Univ, Grad Sch Dent, Div Dent Biomat, Aoba Ku, Sendai, Miyagi 9808575, Japan
[2] Texas A&M Univ, Syst Hlth Sci Ctr, Baylor Coll Dent, Dept Biomat Sci, Dallas, TX 75246 USA
关键词
titanium alloys; corrosion behavior; microstructure;
D O I
10.4012/dmj.23.109
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Anodic polarization was performed in 0.9% NaCl and 1% lactic acid solutions to characterize the relationship between the corrosion behavior and microstructures of cast Ti-Au (5-40%) alloys. An abrupt increase in the current density occurred at approximately 0.6 V vs. SCE for the 30% and 40% An alloys in the 0.9% NaCl solution. The microstructures after corrosion testing indicated that this breakdown may have been caused by the preferential dissolution of the Ti3Au. However, the potential for preferential dissolution was higher than the breakdown potential of stainless steel or Co-Cr alloy, which meant that the corrosion resistance of the Ti-Au alloys was superior. In 1% lactic acid solution, the corrosion resistance of the Ti-Au alloys was excellent, with no breakdown at any composition. In the present test solutions, the Ti-Au alloys up to 20% Au had good corrosion resistance comparable to that for pure titanium.
引用
收藏
页码:109 / 116
页数:8
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