Advances in Molten Salts

ISBN Print: 1-56700-142-4

Chemical and electrochemical study of chromium in molten equimolar CaCl2-NaCl Mixture at 550°C

Аннотация

The chemical and electrochemical properties of solutions of chromium chlorides in the fused CaCl2-NaCl equimolar mixture were studied at 550°C using different working electrodes. We determined the stability range of the various oxidation states of chromium and calculated the standard potentials of the Cr(III)/Cr(II) and Cr(II)/Cr(0) redox couples, the solubility products of the chromium oxides, the kinetic parameters of the electrochemical systems at the different electrodes and the diffusion coefficients of the electroactive species. The results have been compared to those obtained in molten LiCl-KCl eutectic at 450°C.