基于物理场耦合的交流干扰作用下埋地金属管线腐蚀数值仿真  

Numerical Simulation of Corrosion of Buried Metal Pipeline Under AC Interference Based on Physical Field Coupling

作　　者：王承涛 申冠一 许少毅[2] 李威[2] 王禹桥[2] 王树臣[1] 闻东东 李朋宇 WANG Chengtao;SHEN Guanyi;XU Shaoyi;LI Wei;WANG Yuqiao;WANG Shuchen;WEN Dongdong;LI Pengyu(School of Electrical and Control Engineering,Xuzhou University of Technology,Xuzhou 221018,China;School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China;Bozhou Power Supply Company,State Grid Anhui Electric Power Co.,Ltd.,Bozhou 236800,China)

机构地区：[1]徐州工程学院电气与控制工程学院,徐州221018 [2]中国矿业大学机电工程学院,徐州221116 [3]国网安徽省电力有限公司亳州供电公司,亳州236800

出　　处：《中国腐蚀与防护学报》2024年第6期1573-1580,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：江苏省自然科学基金(BK20221120)。

摘　　要：本文构建了一种基于物理场耦合的埋地金属管线交流杂散电流腐蚀数值仿真模型,通过电场与电化学场的相互耦合作用,分析了静态周期和动态周期内钢轨电位和埋地金属管线表面电流密度分布规律,研究了金属管线埋地深度、与交流牵引系统相对角度、相对距离等因素对埋地金属管线表面电流密度分布规律的作用效果。结果表明,一个周期内的交流信号的动态特性和牵引电流整体变化的动态特性均会对埋地金属管线的交流腐蚀演化过程产生重要影响,同时埋地深度、与交流牵引系统相对角度和相对距离是评估埋地金属管线受交流腐蚀作用不可忽视的重要因素。AC electrified rail transit system will lead serious electrochemical corrosion to surrounding buried metal pipelines,which will severely threaten the structural integrity and service reliability of buried oil and gas pipelines.Numerical simulation is an effective method to study the distribution and variation of stray current corrosion macroscopically.In view of this,this paper proposed a numerical simulation model of AC stray current corrosion for buried metal pipeline based on the coupling of physical fields.Through the interaction of electric field and electrochemical field,the distribution patterns of rail potential and current density on the surface of buried metal pipeline during static and dynamic periods is analyzed.The effect of buried depth,relative angle and relative distance between metal pipeline and AC electrified rail transit system on the surface current density distribution were studied.Results show that in a given period the dynamic characteristics of AC signal and dynamic characteristics of overall change of traction current both have an important influence on the evolution process of AC corrosion of buried metal pipeline,and the buried depth,relative angle and relative distance are important factors that cannot be ignored to evaluate the AC corrosion effect for buried metal pipeline.

关 键 词：杂散电流 交流腐蚀 腐蚀仿真 埋地金属管线 交流牵引 

分 类 号：TG172[金属学及工艺—金属表面处理]