Electrochemical oxidation of silver and rhenium electrodes in molten LiF-NaF-KF eutectic at 600 degrees C was investigated by cyclic and convolutional voltammetry. Simulated Cyclic voltammograms were calculated to reinforce understanding of the reaction mechanism. A theoretical relationship was proposed to determine standard potentials from voltammograms of metallic electrodes having an oxidation process governed by Butler-Volmer kinetics. The reversibility of silver oxidation was established and the number of exchanged electrons and the standard potential of the Ag/Ag(I) couple were determined. The rhenium electrode oxidation process was shown to be quasi-reversible and the Re/Re(x) standard potential was estimated.