Electrochemical impedance of the various crevice electrodes - Computer simulation by using matrix

The electrochemical impedance of various crevice electrodes has been calculated by a transmission line model using matrix. Inside of the crevice was divided into 300 parts, and the solution resistance, the charge transfer resistance, and the capacitance of electric double layer were assumed as the function of the position in the crevice. It takes approximately 10 min to calculate one spectrum of the impedance by the desk-top computer. The impedance shows frequency dispersion due to the current distribution in the high frequency range. The experimental impedance of artificial crevice electrodes was in agreement with the calculated results. The current distribution, which originates by the frequency and the position in the crevice, can be obtained in the course of the computer simulation.