Electrochemical behaviour of Ti alloys containing Mo and Ta as β-stabilizer elements for dental application
(1. Faculty of Chemical Engineering and Environmental Protection,
“Gheorghe Asachi” Technical University of Iasi, Iasi 700050, Romania;
2. Faculty of Materials Science and Engineering, “Gheorghe Asachi” Technical University of Iasi,
Iasi 700050, Romania)
“Gheorghe Asachi” Technical University of Iasi, Iasi 700050, Romania;
2. Faculty of Materials Science and Engineering, “Gheorghe Asachi” Technical University of Iasi,
Iasi 700050, Romania)
Abstract: Corrosion behaviour of the studied Ti12Mo and Ti60Ta alloys with the same Mo equivalent values (12%, mass fraction) together with the currently used metallic biomaterials Cp-Ti were investigated for dental applications. The electrochemical properties of the samples were examined using electrochemical techniques: such as open-circuit potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS), in two electrochemical media of artificial saliva and fluoridated artificial saliva (0.1% fluoride ions, F-) at 37 °C. Fluoride is commonly included in toothpastes, odontological gels and dental rinses to prevent dental caries and relieve dental sensitivity. The passive behaviour for all the titanium samples is observed for both solutions. The Ti60Ta alloy appears to possess superior corrosion resistance than the Ti12Mo and Cp-Ti in both electrochemical media.
Key words: Ti12Mo; Ti60Ta; Cp-Ti; open-circuit potential; potentiodynamic polarization; electrochemical impedance spectroscopy