Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/72715
Title: Electrochemical characterization of some dental materials in accelerated environmental testing
Authors: Mareci, Daniel
Sutiman, Daniel
Cailean, Adrian
Mirza Rosca, Julia Claudia 
UNESCO Clasification: 330309 Operaciones electroquímicas
3314 Tecnología médica
Keywords: Ray photoelectron-spectroscopy
Cobalt-based alloys
Cr-Mo alloy
Corrosion behavior
Casting alloys, et al
Issue Date: 2009
Journal: Environmental Engineering and Management Journal 
Abstract: The aim of this study is to investigate the electrochemical behavior of a three casting non-precious dental alloys: Vera PDI (Co-Cr based), Heraenium (Ni-Cr based) and NPG+2 (Cu-Al based) three test solutions: artificial saliva (AFNOR, pH = 8), acidified saliva (pH = 2.5) and fluoridated acidified saliva (1000 ppm F(-), pH = 2.5).Open circuit potential (E(OC)) measurement; potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) are the electrochemical procedures selected for this work. Our results have shown that Vera PDI and Heraenium dental alloys have a good corrosion resistance in artificial saliva, but in acidified saliva the corrosion currents increase. Corrosion currents are also higher in fluoridated acidified saliva as expected because the presence of fluoride ions. The NPG+2 casting alloy present a low corrosion resistance in artificial saliva and a very low corrosion resistance in acidified and fluoridated acidified saliva. The EIS results show that all three dental alloys exhibit passivity at open circuit potential in artificial saliva. For NPG+2 alloy in acidified saliva and fluoridated acidified saliva, the protectiveness of oxide film was no more present. The corrosion resistance of the three non-precious alloys are in the following order: Vera PDI > Heraenium > NPG+2.
URI: http://hdl.handle.net/10553/72715
ISSN: 1582-9596
Source: Environmental Engineering and Management Journal [ISSN 1582-9596], v. 8 (3), p. 397-407
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