Sustainable Mining and Metallurgy

The accelerated life of RuO₂IrO₂/Ti and IrO₂Ta₂O₅/Ti was studied and compared, and the effects of fluorine ion on the accelerated life of the two above-mentioned electrodes were studied. Experimental results show that the accelerated life of IrO₂Ta₂O₅/Ti electrode is about 40 times that of RuO₂IrO₂/Ti electrode. The presence of 1mg/L fluorine ions can reduce the accelerated electrode life of RuO₂IrO₂/Ti electrode by 22% and the accelerated electrode life of IrO₂Ta₂O₅/Ti electrode by 82%. The causes of electrode failure were analyzed by scanning electron microscopy and energy spectroscopy. The analysis results show that the dissolution of the active ingredient in the electrode catalytic layer, the cracking and shedding of the electrode catalytic layer caused exposure and oxidation of the substrate could be the direct causes of the electrode failure.