TITLE

Effect of TiN coating on corrosion resistance of dental NiCr alloy

AUTHOR(S)
HU Bin; CHEN Jie
PUB. DATE
February 2009
SOURCE
Shanghai Journal of Stomatology;Feb2009, Vol. 18 Issue 1, p73
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
PURPOSE: To investigate the effect of titanium nitride coating on corrosion resistance of NiCr alloy in the simulate oral environment. METHODS: The NiCr alloy commonly used for porcelain crown was cast with specimen size of 10mmx10mmx3mm. Then the specimen was coated with a thickness of 2.5µm titanium nitride coating on the surface by multi-are 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 titanium nitride showed that both anodic polarization curve and cathodal polarization curve were flat, and gained the higher natural corrosion potential, lower passivation maintaining current, longer passivation interval. The natural corrosion potential increased from -0.2487V to -0.0685V. The natural corrosion current density decreased from 0.2628µA · cm-2 to 0.1895µA · cm-2. The rupture potential increased from 0.8505V to 1.2566V. CONCLUSION: Titanium nitride coating can improve corrosion resistance of NiCr alloy.
ACCESSION #
41036802

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics