Effects of Ti/TiN multilayer on corrosion resistance of nickel-titanium orthodontic brackets in artificial saliva

被引：92
作者：
Liu, Chenglong
Chu, Paul K.
Lin, Guoqiang
Yang, Dazhi
机构：
[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[2] Dalian Univ Technol, State Key Lab Mat Modificat Laser Ion & Elect Bea, Dalian 116024, Peoples R China
来源：
CORROSION SCIENCE | 2007年 / 49卷 / 10期
基金：
中国国家自然科学基金;
关键词：
multilayered Ti/TiN coating; metal ion release; artificial saliva; corrosion resistance;
D O I：
10.1016/j.corsci.2007.03.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of multilayered Ti/TiN or single-layered TiN films deposited by pulse-biased arc ion plating (PBAIP) on the corrosion behavior of NiTi orthodontic brackets in artificial saliva are investigated. The multilayered Ti/TiN coating is found to exhibit a greater free corrosion potential, much lower passive current density, and no breakdown up to 1.5 V. Moreover, electrochemical impedance spectroscopy (EIS) results indicate that the multilayered Ti/TiN coating has a larger impedance and lower porosity which is believed to be responsible for the exceedingly low metal ion release rate during 720 h exposure in the test solution. Visual inspection of the surfaces reveals different corrosion processes for the TiN and multilayered Ti/TiN coatings. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3783 / 3796
页数：14
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