Abstract When the city underground transmission line was disconnected, it would be in line with the track (pipeline) on the ground or underground in wet soil to form a circuit, and sped up the corrosion of tracks (pipelines). The principle was equivalent to the combination of electrolyte solution of series electrolytic cells in which two electrodes without connecting power supply were as a conductor laied between the two electrodes connecting power supply, then formed a special series electrolysis cell. Based on the above principle, this paper designed innovative experiments.
