Effects of TiN coating on corrosion resistance of dental Co-Cr alloy
- VernacularTitle:TiN涂层对牙科钴铬合金耐蚀性能的影响
- Author:
Jie, CHEN
;
Bin, HU
- Publication Type:Journal Article
- Keywords:
titanium nitride coating;
Co-Cr alloy;
physical vapor deposition;
polarization curve;
corrosion resistance
- From:Journal of Shanghai Jiaotong University(Medical Science)
2009;29(6):660-662,676
- CountryChina
- Language:Chinese
-
Abstract:
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 fiat, 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.
