Abstract

VAZ, Luís Geraldo; GUASTALDI, Antônio Carlos  and  MARQUES DE BRITO, Adriano. A study on dental alloy: characterization and corrosion in citric acid.. Acta odontol. venez [online]. 2007, vol.45, n.3, pp.359-362. ISSN 0001-6365.

ABSTRACT The aim of this work went characterize and to  study the effect of heat treatment  in based copper metallic alloy for application   in dentistry, with relationship to its behavior before the corrosion, in a solution that simulates the aggressiveness of the oral environment. The characterization of the alloy was made by means of chemical analysis and optical microscopy and the corrosion tests consisted in obtaining the potentiostatic polarization curves, in acid citric solution 1g/L. Analyzing the obtained results it was observed that the alloy when submited to the  thermal treatment there is a transformation of the dendritic structure for a phase granular structure. In relation to the corrosive process it was verified by means of potentiostatic polarization curves didn’t happen passivation, as well as there were not differences in the resistance the corrosion between the samples with and without  thermal treatment.

Keywords : Copper based alloy; dental alloys; corrosion.