摘要
采用电化学测试技术研究了人体医用金属材料工业纯钛和Ti6Al4V合金在人工模拟体液中的腐蚀行为。结果表明 ,阳极极化后两种合金均未发现点蚀 ,工业纯钛的维钝电流密度小于Ti6Al4V合金 ,前者的阳极极化性能优于后者。Ti6Al4V合金缝隙试样在阳极电位超过 + 2 0 0 0mV(vsSCE)后 ,电流开始急剧增大 ,发生了缝隙腐蚀 ;通过电子探针分析发现 ,在缝隙内Al和V两种元素发生活性溶解。工业纯钛在电位达到 + 40 0 0mV(vsSCE)时仍没有发生缝隙腐蚀。
The corrosion behavior of surgery medical materials commercially pure Ti (abridged as CPTi ) and Ti6Al4V alloy in Ringer's artificial body fluid was studied with electrochemical methods. The results show that no pitting corrosion is found on these two alloys. The passivation current density of CPTi is lower than that of Ti6Al4V, which indicates that the former's anodic polarization capacity is better than the latter's. With the polarization potential over than 2 000 mV(vs SCE), the crevice corrosion happens on Ti6Al4V alloy sample. However that is not found on CPTi sample when the potential is 4 000 mV(vs SCE). The EPMA analysis of Ti6Al4V alloy crevice corrosive sample shows that Al and V actively dissolve, then migrate and electrically deposit. [
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第1期107-110,共4页
The Chinese Journal of Nonferrous Metals
基金
辽宁省科学技术基金!资助项目 (972 2 10 )
