For a Long distance buried gas pipeline,the auxiliary anode bed grounding resistance of the cathodic protection system is on the high side,which brings adverse influence to the system operation.In this paper,the geological conditions,anode bed materials,spacing,size and material types are analyzed and effective solutions are put forward,and their effects are evaluated.The results show that the optimized method can effectively reduce the grounding resistance of the auxiliary anode bed,increase the output of the cathodic protection current,control the switch-off potential within the allowable range of the specification,and slow down the pipeline corrosion.
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