The corrosion of dental amalgam in some commercial mouthwash solutions

Abstract

This study investigates the electrochemical behaviour of a Tytin© dental amalgam in two commercial mouthwash solutions and compares it with the behaviour of dental amalgam in artificial saliva. Open circuit potential measurement, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) are the electrochemical procedures of investigation. Our results have shown that Tytin© dental amalgam has a somewhat good corrosion resistance in artificial saliva. After immersion in mouthwash solutions the corrosion currents increase. The EIS results show that dental amalgam exhibited passivity at open circuit potential in artificial saliva whereas in mouthwash solutions the protectiveness of passive layer was no more present.