埋地阴极保护管线的交流干扰腐蚀

通过阴极保护管道交流腐蚀案例,总结了交流输电线路等交流设施对埋地管道的干扰规律、阴极保护管道交流腐蚀的特征、发生条件及影响因素等。综述了交流电对管道钢材料活化和钝化体系的电极过程和极化行为的主要影响规律;高阴极保护水平对交流腐蚀的协同加速作用。系统阐述了阴极保护条件下管道发生交流腐蚀的机理及评估准则等方面的最新研究进展;梳理了交流干扰腐蚀机理模型中的主要观点和影响因素,同时阐述了交流干扰下阴极保护技术面临的主要问题。

Research on AC Interference Corrosion of Buried Pipeline with Cathodic Protection

Through the case study of AC corrosion on pipeline with cathodic protection, the interference trend of AC facilities such as AC transmission line on buried pipeline, the characteristics, occurrence conditions and influencing factors of AC corrosion of pipeline with cathodic protection are summarized. The main influence of alternating current on the electrode process and polarization behavior of pipeline steel material activation and passivation system, and the synergistic acceleration of high cathodic protection level on AC corrosion are summarized. This paper systematically describes the latest research progress in the mechanism and evaluation criteria of AC corrosion of pipelines under cathodic protection. The main viewpoints and influencing factors in the mechanism model of AC interference corrosion are discussed, and the problems in cathodic protection technology of pipeline under the condition of AC interference are expounded.