Analysis on the Impact of Electrolytic Grounding Cell for the Cathodic Protection System of Long Distance Pipeline

This paper introduces the constitution and function of electrolytic grounding cell. The field experimental data demonstrates that the measuring errors of pipe/soil potential produce and the interference of output values of potentiostat occur by the electrolytic grounding cell, and very small-scale internal resistance will result in the current loss. The authors consider that the electrolytic grounding cell is not suitable for installing in rich subterranean water region.