INVESTIGATION ON THE REPAIRING EFFECT OF ALTERNATING VOLTAGE ELECTRIC FIELD ON THE PITTED NiCr ALLOY ELECTRODE

The repairing effect of alternating voltage electric field on the pitted NiCr alloy electrode is investigated by means of conventional electrochemical measurement techniques.The effect of the alternating voltage electric field with different parameters,such as the top or bottom potentials,frequency,ratio of time,on the properties of repassive film displays certain regularity,and exists optimal ranges,that is E H(800～1000 mV), E L(-200～0 mV), F (5～20 Hz).The electric field with adequate parameters will produce obvious repairing effect on the pitted electrode.The parameters' condition is optimized by perpendicularity experiment,i.e. E H=800 mV, E L=-200 mV, R=1/2,F =10 Hz.