The thermal-decompositedIr-Ta metal oxide anode coated on titanium was studied theeffect of wet-dry circle, temperature and oxygen content of seawater.Surfacecomposition,morphology and crystal structure of deactivation behavior were characterized bymeans of SEM, EDX and XRD. Deactivation behavior and deactivation mechanism wereanalyzed by the tests of cyclic voltammetry, polarizing curve measurement, electrochemicalimpedance spectroscopyElectrolyzer voltage decreased then kept stable.Electric current of the anode decresed alot and electro-catalytic activity got down,however, oxygen evolution potential increasedwith the incresment of wet-dry circles.Cyclic voltammetry electricity decreased to a verysmall number. Resistence of coating and tantalum was6.015·cm2,rate of reaction of0.5-5anode was the largest at the first circle.The electrochemical propertiesof Ir-Ta oxide anode effected by the temperature werestudied.When temperature of seawater increased,the angle of IrO2did not have anychange,but the strength weakend and width increased a little. With the temperature ofseawater increased, the area of cyclic voltammetry curve decreased,and the numner ofactive ingredients decreased. And resistence of the anode which owned the longestelectrolysis time was the largest. When the potential increased, current density alsoimproved and rate of oxygen reaction increased. The electrochemical properties of Ir-Taoxide anode effected by the temperature and oxygen content of seawater were studied.The electrochemical propertiesof Ir-Ta oxide anode effected by the oxygen content ofseawater were studied. The loss of active ingredients of6pmm anode was the most.With theoxygen content of seawater increased, the area of cyclic voltammetry curve decreased,and thenumber of active ingredients decreased and also the rate of reaction. The corrosion potentialE0changed little,which showed that oxygen content had hardly effect on E0.The rate ofcorrosion decreased with the oxygen content increasing. Rpincreased with oxygen contentofseawater increasing. |