交直流杂散电流干扰腐蚀已成为管道失效和破坏的主要原因之一，严重威胁管道运行安全。 为了全面掌握不同交直流杂散电流干扰源的特征，以及对管道阴极保护参数的影响规律，采用试片法对某输气管道不同类型的干扰源进行长期监测。 通过测试结果，分析总结了交、直流静态干扰、动态干扰及静态-动态复杂干扰等7 种干扰类型的典型干扰特征，同时针对复杂的交直流混合干扰，提出人身安全、交直流混合干扰和阀室绝缘设施相应的评价指标、阈值范围及准则和推荐方法。 研究成果为管道运行方迅速明确杂散电流干扰源类型，制定相应防护措施，减少复杂杂散电流干扰造成的管道腐蚀风险提供依据。

AC/DC stray current interference corrosion has become one of the main causes of pipeline failure and damage， which seriously threatens the safety of pipeline operation.In order to understand the characteristics of different AC-DC stray current interference sources and their influence on the cathodic protection parameters of pipelines， the coupon method was used to monitor the interference sources of different types in a gas pipeline for a long time.Based on the test results， the typical interference characteristics of 7 types of interference types， including AC and DC static interference， dynamic interference and statically dynamic complex interference， were analyzed and summarized.Meanwhile， for complex AC and DC mixed interference， the corresponding evaluation indexes， threshold ranges， criteria and recommended methods were proposed for personal safety， AC and DC mixed interference and valve chamber insulation facilities.The research results provide a basis for pipeline operators to quickly identify the types of stray current interference sources， formulate corresponding protective measures， and reduce the risk of pipeline corrosion caused by complex stray current interference.