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Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
ISSN Online 2668-8212
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Revista de Chimie (Rev. Chim.), Year 2015, Volume 66, Issue 12,





MADALINA NICOLETA MATEI, IULIA CHISCOP, KAMEL EARAR, MIHAELA MOISEI, DANIEL MAREC, LUCIA CARMEN TRINCA, TEODOR STAN, CORNEL MUNTEANU, MARIANA PACURAR, MARIANA ILIE
Evaluation of Corrosion Resistance of NiTiNb Orthodontic
Wires in Tomato Juice

Abstract:

An investigation about corrosion resistance of NiTiNb orthodontic wires in tomato juice at 37oC have been carried out by using electrochemical techniques. For comparison, NiTi orthodontic wires have also been evaluated. Both samples were examined using electrochemical techniques: open circuit potential, linear potentiodynamic polarization (LPP) and electrochemical impedance spectroscopy (EIS) in tomato juice. The electrochemical corrosion properties of NiTiNb and NiTi orthodontic wires were measured in terms of zero current potential (ZCP) and corrosion current density (jcorr). EIS technique was applied to study the nature of the passive film formed on both samples at 10 minutes and 1 hour immersed time in tomato juice. From EIS data, an equivalent circuit (EC) with one time constant was modeled. Keywords: NiTiNb, orthodontic wires, tomato juice, cyclic polarization, EIS, SEM


Issue: 2015, Volume 66, Issue 12
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