Corrosion Resistance and Biocompatibility of High Nitrogen-bearing Stainless Steels
Corrosion Resistance and Biocompatibility of High Nitrogen-bearing Stainless Steels
复制标题
高氮不锈钢的耐腐蚀性和生物相容性
DOI：
10.3323/jcorr1991.47.570
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
T. Kaku
中科院分区：
文献类型：
--
作者：
K. Endo;Y. Abiko;Masahiro Suzuki;H. Ohno;T. Kaku
在模拟生理环境中，对两种高含氮奥氏体不锈钢和SUS 316l的耐蚀性和细胞相容性进行了评价。通过动电位极化测量和分析合金试样在0.9% NaCl溶液中释放的金属离子，评价其耐蚀性。用x射线光电子能谱（XPS）对合金表面进行了表征。在合金表面的培养条件下，观察了人牙龈成纤维细胞的生长情况。高含氮Fe-Cr-Mn- mo合金的点蚀电位高于高含氮Fe-Cr-Mn合金和SUS 316 L.钝化膜外形成的CrN和钝化膜下合金表面富集的N可有效提高抗点蚀能力。本研究证明了耐蚀性与金属诱导的细胞毒性之间的相关性。发布的数量从高铁和铬离子N-bearing Fe-Cr-Mn合金约一个数量级高于从高N-bearing Fe-Cr-Mn-Mo合金,SUS 316 l细胞增长率高N-bearing Fe-Cr-Mn合金是明显的沮丧,因为大量的金属离子释放。高含氮Fe-Cr-Mn-Mo奥氏体不锈钢具有无磁性、高局部耐腐蚀性和优异的细胞相容性等特点，满足了作为植入材料使用的要求。
The corrosion resistance and cytocompatibility of two high N-bearing austenitic stainless steels as well as SUS 316 L were evaluated in a simulated physiological environment . Potentiodynamic polarization measurements and analysis of released metal ions from alloy specimens immersed in 0.9 % NaCl solution were made to evaluate the corrosion resistance. The surface of the alloys was characterized with X-ray photoelectron spectroscopy (XPS). Cell growth of human gingival fibroblasts was examined under culture conditions on these alloy surfaces. The pitting potential of the high N-bearing Fe-Cr-Mn-Mo alloy was higher than that of high N-bearing Fe-Cr-Mn alloy and SUS 316 L. CrN formed in the outer region of the passive film and N enriched at the alloy surface under the passive film may be effective in improving pitting corrosion resistance. The present study demonstrated a correlation between corrosion resistance and metal-induced cytotoxity. The amount of released Fe and Cr ions from high N-bearing Fe-Cr-Mn alloy was approximately one order of magnitude higher than that from high N-bearing Fe-Cr-Mn-Mo alloy and SUS 316 L. The cell growth rate on the high N-bearing Fe-Cr-Mn alloy was markedly depressed because of the large amount of released metal ions. The characteristics of the high Nbearing Fe-Cr-Mn-Mo austenitic stainless steel such as non-magnetism, high localized corrosion resistance, and excellent cytocompatibility meet the requirements for use as an implant material.