In vitro corrosion resistance of Lotus-type porous Ni-free stainless steels.
The corrosion behavior of three kinds of austenitic high nitrogen Lotus-type porous Ni-free stainless steels was examined in acellular simulated body fluid solutions and compared with type AISI 316L stainless steel. The corrosion resistance was evaluated by electrochemical techniques, the analysis of released metal ions was performed by inductively coupled plasma mass spectrometry (ICP-MS) and the cytotoxicity was investigated in a culture of murine osteoblasts cells. Total immunity to localized corrosion in simulated body fluid (SBF) solutions was exhibited by Lotus-type porous Ni-free stainless steels, while Lotus-type porous AISI 316L showed very low pitting corrosion resistance evidenced by pitting corrosion at a very low breakdown potential. Additionally, Lotus-type porous Ni-free stainless steels showed a quite low metal ion release in SBF solutions. Furthermore, cell culture studies showed that the fabricated materials were non-cytotoxic to mouse osteoblasts cell line. On the basis of these results, it can be concluded that the investigated alloys are biocompatible and corrosion resistant and a promising material for biomedical applications.
Alvarez
Kelly
K
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan.
Hyun
Soong-Keun
SK
Fujimoto
Shinji
S
Nakajima
Hideo
H
D000497:Alloys / Q000737:chemistry; D000818:Animals; D001672:Biocompatible Materials / Q000032:analysis / Q000737:chemistry*; D001826:Body Fluids / Q000737:chemistry; D049109:Cell Proliferation; D002478:Cells, Cultured; D003343:Corrosion; D004563:Electrochemistry; D008422:Materials Testing; D051379:Mice; D008855:Microscopy, Electron, Scanning; D010006:Osteoblasts / Q000166:cytology / Q000502:physiology; D013193:Stainless Steel / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors; D014961:X-Ray Diffraction
D000497:Alloys; D001672:Biocompatible Materials; C426023:austenitic steel; D013193:Stainless Steel