Serum effect on the electrochemical behaviour of titanium, Ti6A14V and Ti6Al7Nb alloys in sulphuric acid and sodium hydroxide

被引：54
作者：
Contu, F
Elsener, B
Böhni, H
机构：
[1] Ctr Electrochem Sci & Engn, Charlottesville, VA 22904 USA
[2] Univ Cagliari, Dept Inorgan & Analyt Chem, Cagliari, Italy
[3] Swiss Fed Inst Technol, Inst Mat Chem & Corros, CH-8093 Zurich, Switzerland
来源：
CORROSION SCIENCE | 2004年 / 46卷 / 09期
关键词：
titanium; titanium-alloys; cathodic reaction; anodic reaction; inhibitor efficiency;
D O I：
10.1016/j.corsci.2004.01.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behaviour of cp titanium Ti6Al4V and Ti6Al7Nb alloys is investigated in 2 M sulphuric acid and 2 M sodium hydroxide with and without additions of bovine serum in order to get an insight into the effect of a biological electrolyte on the active corrosion of widely used metallic implants. Ti6Al7Nb alloy shows the highest corrosion resistance in 2 M sulphuric acid, whereas it is the least corrosion-resistant in 2 M sodium hydroxide. Bovine serum inhibits the hydrogen evolution as well as the anodic dissolution reactions in both sulphuric acid and sodium hydroxide. However, the cathodic efficiency of serum in sodium hydroxide is significantly higher than in sulphuric acid. Besides, the results suggest that serum forms a 2-D adsorption layer on the implant materials. Additionally, the surface coverage in sodium hydroxide is ca. 90%, while in acidic solutions only ca. 40%. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2241 / 2254
页数：14
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