Pitting, crevice and galvanic corrosion of REX stainless-steel/CoCr orthopedic implant material
- 作者：Reclaru ; L. ; Lerf ; R. ; Eschler ; P.-Y. ; Blatter ; A. ; Meyer ; J.-M.
- 关键词：Electrochemistry ; Pitting ; Crevice and galvanic corrosion ; Stainless steels ; CoCr alloy ; Orthopedic prostheses
- 刊名：Biomaterials
- 出版年：2002
- 期刊代码：7_01429612
- 类别：ms
- 出版时间：August, 2002
- 卷：23
- 期：16
- 页码：3479-3485
- 文件大小：226 K
摘要
The corrosion behavior of surgical implant CoCr alloy and REX 734 steel has been investigated. The pitting or crevice corrosion potentials have been determined to reach values as high as 500mV vs. SCE for CoCr and 450mV vs. SCE for REX 734. The galvanic corrosion behavior of CoCr/REX 734 couples has been evaluated with various electrochemical techniques. The measurement of the corrosion current of the galvanic couple as well as its prediction by applying mixed potential theories on measured potentiodynamic polarization curves revealed low galvanic currents in the range of nanoamperes.