[Study on electrochemical mechanism of coronary stent used austenitic stainless steel in flowing artificial body fluid].
The electrochemical mechanism of austenitic stainless steel (SUS316L and SUS317L) coronary stents in flowing artificial body fluid has been investigated with electrochemical technologies. The results indicated that the flowing medium coursed the samples' pitting potential Eb shift negatively, increased the pitting corrosion sensitivity, accelerated its anodic dissolution, but had little effects on repassivated potential. The flowing environment had great effects on cathodic process. The oxygen reaction on the samples' surface became faster as the cathodic process was not controlled by oxygen diffusion but by mixed diffusion and electrochemical process. With the increase of velocity of solution, the pitting corrosion becomes liable to occur under this circumstance.
Liang
Chenghao
C
College of Chemical Engineering and Technology, Dalian University of Technology, Dalian, China. Liangch@chem.dlut.edu.cn
Guo
Liang
L
Chen
Wan
W
Wang
Hua
H
D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids / Q000737:chemistry; D003343:Corrosion; D004563:Electrochemistry; D008422:Materials Testing; D013193:Stainless Steel / Q000737:chemistry*; D015607:Stents
D001672:Biocompatible Materials; D013193:Stainless Steel