EVALUACIÓN DE LA SUSCEPTIBILIDAD A LA CORROSIÓN DE PARES GALVÁNICOS DE AMALGAMAS DE PLATA CON ALEACIONES DENTALES Ni-Cr EN SALIVA ARTIFICIAL USANDO EL MÉTODO DE EVANS Y LAS FÓRMULAS DE MANSFELD

Abstract

Galvanic corrosion is a process of metallic dissolution that takes place when two metals of different electrochemical potential are submerged in an electrolyte, so originating electrical current between metals through conductor environment. For restoration of lost or deteriorated dental pieces different alloys are used frequently, then mouth is exposed to electrical currents that circulate through the saliva and dental fluids. In the present work the method of Evans and the formulas of correction of Mansfeld were used to evaluate the susceptibility to corrosion of galvanic pairs of amalgams of silver of high copper with Ni-Cr alloys that contain beryllium, and that products of corrosion released in greater amount to electrolytic environment contain ions of Hg, Ag, Ni and Cr.