Corrosion Behavior of TiSiN Coatings Deposited on Ni-Cr Alloy in Artificial Saliva with and without Fluoride

Abstract:

TiSiN thin films were deposited on NiCr dental alloy in order to enhance the corrosion resistance in artificial saliva with and without fluoride content. The TiSiN films were prepared using reactive cathodic arc method at two different substrate bias voltages (-50 V and-200 V). For the corrosion evaluation, artificial saliva with pH=5.2 was chosen, because this is a critical value for mineral dissolution of dental tissue which can affect the dental alloys. A content of 0.1 % NaF was added to the artificial saliva to simulate the effect of fluoride based hygiene products. The TiSiN coated NiCr alloys exhibited a higher corrosion resistance than the NiCr substrate, irrespective of the testing environment. The best corrosion resistance was found for the TiSiN deposited at-200 V.

• Periodical: Key Engineering Materials (Volume 638)
• Pages: 47-53
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.638.47
• Online since: March 2015
• Authors: Mihaela Dinu, Mariana Braic, M. Tarcolea, Alina Vladescu, Iulian Antoniac, Cosmin Mihai Cotruț*
• Keywords: Cathodic Arc, Dental Alloy, NaF, Roughness, TiSiN Coating

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