摘要
采用电化学方法和电子探针表面测试技术 ,研究了 316L不锈钢和Co Cr合金生物材料在模拟体液的腐蚀行为 ,并考察了 pH变化的影响。结果表明 ,Co Cr合金环状伏安扫描曲线无滞后现象 ,表现出较好的耐蚀性能。 316L不锈钢则出现明显的滞后环 ,有较大的局部腐蚀敏感性。pH降低 ,浸泡试样腐蚀率增大。电子探针表面分析结果 ,由于闭塞电池效应 ,不锈钢试样的缝隙区发生Fe、Cr和Ni元素的阳极活化溶解 ,而引起缝隙腐蚀。
Corrosion behavior of 316L stainless steel and Co Cr biometallic materials in artificial body fluids were studied and the influence of pH was investigated. The results showed that Co Cr alloy performed very well in corrosion resistance since its polarization curves exhibited no hysteresis. The 316L stainless steel exhibited significant hysteresis and so it was susceptible to local corrosion. The decrease of the pH should not be neglected since it significantly increased the corrosion rate of testing materials. The EPMA analysis indicated that Fe, Cr and Ni actively dissolved in crevice area of 316L stainless steel sample and resulted in crevice corrosion.
出处
《中国生物医学工程学报》
EI
CAS
CSCD
北大核心
2000年第4期432-435,共4页
Chinese Journal of Biomedical Engineering
基金
辽宁省科学技术基金
三束改性国家重点实验室资助项目
关键词
模拟体液
生物医学材料
腐蚀
Artificial body fluids
Biomedical material
Corrosion
