Corrosion resistance of galvanic pairs of titanium with silver amalgams in artificial saliva using electrochemical methods

ABSTRACT Silver amalgams are used to fill damaged teeth, while titanium (cp Ti and Ti-6Al-4V) is used in dental implants due to its biocompatibility and osseointegration capacity. The interaction of these materials in the oral cavity, through saliva, can generate galvanic corrosion and release metallic ions harmful to the health of users. This study evaluates the corrosion resistance of galvanic couples formed by high-copper silver amalgam (Duralloy) and titanium (CP Ti and Ti-6Al-4V) using electrochemical methods (potentials, current densities, Evans diagrams, and Mansfeld correction formulas in aerated artificial saliva). The results indicate that the combination of Duralloy with CP Ti and Ti-6Al-4V presents the highest corrosion resistance, which is corroborated by long-term current density curves.