摘要
目的:研究表面镀氮化钛膜和镀金膜后对钴-铬合金电化学腐蚀行为的影响。方法:利用多弧离子镀和电镀方法分别在钴-铬合金表面沉积氮化钛和金薄膜,通过电化学综合测试系统测试2种镀膜及未镀膜钴-铬合金试件在人工唾液中的稳态自腐蚀电位,从微机系统输入动电位扫描参数后记录其极化曲线,用系统软件进行线性极化拟合得出各试件的腐蚀电流密度和极化电阻。结果:钴-铬合金的自腐蚀电位、腐蚀电流密度和极化电阻分别为-221.54mV、155.43nAcm-2、167.27kΩ,镀金试件为-146.09mV、86.86nAcm-2、299.32kΩ,镀氮化钛试件为-122.79mV、65.80×10-2nAcm-2、395.15×102kΩ,镀膜试件的自腐蚀电位、极化电阻高于未镀膜者,而腐蚀电流密度降低,其中,镀氮化钛试件的各项指数变化更明显。结论:在钴-铬合金表面镀膜可以改善其耐腐蚀性,氮化钛薄膜的性能更优于金薄膜。
Objective ： To investigate the effects of TiN and Au coating on electrochemical corrosion of Co- Cr alloy. Methods：TiN and Au coating were prepared by multi-arc ion plating and galvanization respectively. The electrochemical method was used to get the electric potential of corrosion （Ecorr） of TiN, gold coated and uncoated samples in artifical saliva environment. After importing the dynamic electric scanning parameters, the polarization curve can be obtained, which was afterwards linearly fitted to acquire the polarization resistance （Rp） and current density of corrosion （Icorr） of individual test components. Results：Compared with the control alloy without coating, the Ecorr and Rp of coated samples were higher, and the Icorr was lower. Moreover, these parameter differences were more obvious at TiN coated samples. Conclusion ： The anticorrosion performance of Co- Cr alloy is improved with TiN and Au coating. TiN coating exhibits a superior performance compared with conventionally gold coating.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2009年第3期348-351,共4页
Journal of Practical Stomatology
关键词
钴-铬合金
表面涂层
耐蚀性
Cobalt-chromium alloy
Sulface modification
Corrosion resistance
