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《Materials Protection》 2005-06
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Failure Monitoring of Ti-Based IrO_2-Ta_2O_5 Oxide Anode and Exploration of the Failure Mechanism

ZHAO Ya-ling~a, LONG Xiu-hui~b, CHU Li-ying~b(a. College of Basic Science; b. College of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China)  
Ti-based IrO_2-Ta_2O_5 oxide anode was prepared by thermal decomposition. The failure mechanism of the oxide anode was studied. Thus the variations in the morphology and electrochemical properties of the oxide anode subject to accelerated electrolysis in aqueous sulfuric acid were examined by means of scanning electron microscopy (SEM), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results showed that the failure of the oxide anode was not attributed to the electrocatalytic deactivation of the oxide coating itself but to the large area delamination of the oxide coating caused by the corrosion passivation of the substrate metal which made the substrate unable to act as the electric conductive supporter.
【CateGory Index】: TG172
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