The electrochemical corrosion of molybdenum electrodes in TV glass melts with the components of SiO2-Al2O3-Na2O-K2O-SrO-BaO-ZrO2 containing antimony ions was investigated at 1350.. or 1450... The corrosion rate of the molybdenum electrodes increased with increasing antimony concentration and temperature. When the alternating current (AC) of 50Hz was applied to the electrodes, the corrosion rate of the electrodes increased with increasing current density. Any corrosion of the electrodes could not be observed up to 1 A/cm2 in the antimony-free glass melt. The corrosion rate of electrodes increased linearly with the antimony concentration in the glass melt. From these results it was suggested that the primary corrosion process was the oxidation of the molybdenum electrodes by antimony ions in the glass melt both with and without AC supply under our experimental conditions. The AC supply accelerated the corrosion of the electrodes by formation of molybdenum ions during the anodic polarization, followed by the reduction of antimony ions in the glass melt in preference to the molybdenum ions during the cathodic polarization.
