About this Engineering article
Comparative corrosion study of “Ni-free” austenitic stainless steels in view of medical applications by L. Reclaru; R. Ziegenhagen; P.-Y. Eschler; A. Blatter; J. Lemaître is a Engineering article available to read on EtoBox.
The role of nickel in the biological response to alloys used in medical devices is of immense significance with regard to toxicology and biological performance. There is now a tendency to take nickel out of alloys for medical applications. However, this needs careful evaluation since no compromise is acceptable with regard to mechanical properties, corrosion resistance or any other harmful consequences due to the nickel substitution. This paper analyses the corrosion behaviour and cations released for five austenitic steels, nominally "nickel-free". The analysis of electrochemical parameters, open circuit potential, polarisation resistance, Tafel slopes, corrosion current, breakdown potential, potentiodynamic polarisation curves, and coulometric analysis by zone, reveal that the new austenitic steels, nominally "nickel-free", do not behave in the same way. In the family of steels studied, quite a large dispersion is noted in the corrosion behaviour. With regard to the crevice corrosion behaviour, the steel grades studied can be classified into three groups, with crevice potentials of 600-650mV; 350-450mV and 100-150mV. The release of 18 cations (Al, Ba, Be, Cd, Co, Cr, Cu, Fe, Li,
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- Author
- L. Reclaru; R. Ziegenhagen; P.-Y. Eschler; A. Blatter; J. Lemaître
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1742-7061)
- Published
- 2006
- Language
- EN
- Field
- Engineering (Physical Sciences)