Study on the Influence of AC Stray Current on Buried Long Distance Pipeline

With the rapid development of China's national economy and long-distance pipeline, the problems of parallel and cross laying of pipelines, transmission lines and railways are becoming increasingly prominent. AC interference corrosion threatens the safety of tube body, anticorrosive coating and cathodic protection equipment. The widespread application of UHV transmission lines puts forward higher requirements for pipeline design and operation safety. In order to reduce the harm of high-voltage transmission lines to pipelines, the mechanism of the influence of ac stray current on pipelines was analyzed, an experimental platform of AC interference corrosion was built, the influence of ac stray current density on corrosion rate was studied by weight loss method of corrosion specimens, and the protection measures and evaluation conditions of stray current were proposed.