SOLUTION RESISTANCE EQUALIZATION IN CORROSION ELECTROCHEMISTRY MEASUREMENTS

Several methods such as selection of apparatus,measurement methods,appropriate polarization range and data amending for eliminating the effect of the resistance between work electrode and Luggin capillary in electrochemical measurement are introduced.It should be pointed out that the results of equidistance calculation or EIS measurement should only be used in a limited scope,and couldn’t be extended to the whole range of the measurement.Normally,in strong polarization region,because the shifting of the ion concentration near the electrode surface occurs and the movement speed of ions is much faster due to the effect of the electric field,solution resistance is less than the resistance at the corrosion potential.