In vitro corrosion resistance of Lotus-type porous Ni-free stainless steels
In vitro corrosion resistance of Lotus-type porous Ni-free stainless steels
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DOI：
10.1007/s10856-008-3458-6
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发表时间：
2008-11-01
影响因子：
3.7
通讯作者：
Nakajima, Hideo
中科院分区：
文献类型：
--
作者：
Alvarez, Kelly;Hyun, Soong-Keun;Nakajima, Hideo
研究了3种奥氏体高氮莲花型多孔无镍不锈钢在脱细胞模拟体液中的腐蚀行为，并与AISI 316L不锈钢进行了比较。通过电化学技术评价其耐腐蚀性，通过电感耦合等离子体质谱（ICP-MS）分析释放的金属离子，并在小鼠成骨细胞培养物中研究细胞毒性。莲花型多孔无镍不锈钢在模拟体液（SBF）溶液中表现出对局部腐蚀的完全免疫力，而莲花型多孔AISI 316 L在极低击穿电位下表现出极低的耐点蚀性，这是由点蚀证明的。此外，莲花型多孔无镍不锈钢在SBF溶液中显示出相当低的金属离子释放。细胞培养结果表明，该材料对小鼠成骨细胞无细胞毒性。根据这些结果，可以得出结论，所研究的合金是生物相容性和耐腐蚀性和生物医学应用的一种有前途的材料。
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.