Pitting corrosion of a dental cooper alloy in artificial saliva

Abstract

The corrosion behaviour of a copper based dental alloy (GAUDENT) in a simulated saliva environment was studied by potentiodynamic polarization and by electrochemical impedance spectroscopy (EIS). It was established that the metallurgical processing (melting in air and manually casting) influences negatively the corrosion resistance. The keeping of this alloy in solution reduces the thermodynamic tendency to corrosion but not influence appreciably the type and intensity of the corrosion. In all cases a pitting corrosion was evidenced.