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Title: Galvanic Corrosion Behaviour of Ti and Ti6Al4V Coupled to Noble Dental Alloys
Authors: Solá, Cristina
Amorim, Armanda
Espías, Ángel
Capelo, Sofia
Fernandes, João
Proença, Luís
Sanchez, Luis
Fonseca, Inês
Editors: Antonijevic, Milan M.
Keywords: Titanium
Ti6Al4V alloy
noble dental alloys
corrosion resistance
electrochemical techniques
galvanic couples
Issue Date: 2013
Publisher: ESG
Citation: Solá C., Amorim A., Espías A., Capelo S., Fernandes J., Proença L., Sanchez L., Fonseca I. (2013). Galvanic Corrosion Behaviour of Ti and Ti6Al14V Coupled to Noble Dental alloys, International Journal of Electrochemical Science, 8: 406 - 420
Abstract: This study aims to evaluate the electrochemical corrosion behaviour of titanium and Ti6Al4V alloy coupled to the following noble dental alloys: Pontor® 2, Cerapall® 2, V-Gnathos® Plus and Pagalin® 2. The study was conducted in artificial saliva, pH 7.1, at 37 , by linear sweep voltammetry, electrochemical impedance spectroscopy and chronoamperometry.The Rp values of the noble dental alloys varied from 104 to 105 Ω cm2. Data from Eocp curves, linear polarization resistance, Tafel plots and electrochemical impedance spectroscopy lead to the same order for the resistance against corrosion of the four noble alloys in artificial saliva. The order from the less to the more reactive alloy is: Cerapall® 2 → Pontor® 2 → V-Gnathos® Plus → Pagalin® 2. Values of the icouple, varying between 0.2 and 0.7 μA cm-2, were obtained for the four noble alloys when coupled to pure titanium or to the titanium alloy, respectively. Among the couples studied the Pontor® 2 | Ti was found to be the more resistant galvanic couple, while the Cerapall® 2 | Ti6Al4V presents the lowest corrosion resistance.
ISSN: 1452-3981
Type: article
Appears in Collections:PAO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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