TiN涂层对牙科钴铬合金耐蚀性能的影响  

Effects of TiN coating on corrosion resistance of dental Co-Cr alloy

作　　者：陈洁[1] 胡滨[1] 

机构地区：[1]上海交通大学医学院第九人民医院口腔医学院口腔修复科上海市口腔医学研究所上海市口腔医学重点实验室,上海200011

出　　处：《上海交通大学学报（医学版）》2009年第6期660-662,676,共4页Journal of Shanghai Jiao tong University:Medical Science

基　　金：上海市重点学科(特色学科)建设项目(T0202)~~

摘　　要：目的在模拟口腔环境中,研究氮化钛(TiN)涂层对牙科钴铬(Co-Cr)合金耐蚀性能的影响。方法选取临床常用的钴铬合金,制作成10 mm×10 mm×3nm规格的试件,采用电弧离子镀物理气相沉积技术,在试件表面沉积一层2.5μm厚的TiN涂层。将沉积涂层前后的试件分别置于人工唾液中,通过电化学工作站进行极化曲线分析。结果塔菲尔极化曲线图形显示,钴铬合金表面经TiN涂层后表现出阳极和阴极极化曲线低平,自腐蚀电位向正方向移动,钝化区间变长。观察环行阳极极化曲线图形发现,TiN涂层后无明显滞后面积。结论TiN涂层可提高钴铬合金的耐蚀性能。Objective To investigate the effects of titanium nitride（TiN） coating on corrosion resistance of dental Co-Cr alloy in the simulated oral environment. Methods The Co-Cr alloy commonly used was casted with specimen sized of 10 mm × 10 mm ×3 mm. Then the specimen was coated with a thickness of 2.5 μm TiN coating on the surface by multi-arc physical vapor deposition. The Tafel polarization curves of the specimen before and after coating titanium nitride in artificial saliva were measured by electrochemical station. Results From the Tafel polarization curves, the specimen after coating TiN showed that both anodic polarization curve and cathodal polarization curve were flat, natural corrosion potential moved to the positive way, and passivation interval got longer. From the annular anodic polarization curves, the specimen after coating TiN had almost no ＂delay area＂. Conclusion TiN coating can improve corrosion resistance of Co-Cr alloy.

关 键 词：TIN涂层 钴铬合金 物理气相沉积 极化曲线 耐蚀性能 

分 类 号：R783.1[医药卫生—口腔医学]