TY - JOUR
T1 - Galvanic corrosion behaviour of Ti and Ti6al4V coupled to noble dental alloys
AU - Solá, Cristina
AU - Amorim, Armanda
AU - Espías, Ángel
AU - Capelo, Sofia
AU - Fernandes, João
AU - Proença, Luís
AU - Sanchez, Luis
AU - Fonseca, Inês
PY - 2013/1
Y1 - 2013/1
N2 - 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°C , 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.
AB - 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°C , 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.
KW - Corrosion resistance
KW - Electrochemical techniques
KW - Galvanic couples
KW - Noble dental alloys
KW - Ti6Al4V alloy
KW - Titanium
UR - http://www.scopus.com/inward/record.url?scp=84873314097&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84873314097
SN - 1452-3981
VL - 8
SP - 406
EP - 420
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
IS - 1
ER -