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

doi:10.11902/1005.4537.2024.016

中国腐蚀与防护学报

2024, Vol. 44

Issue (6): 1573-1580 CSTR: 32134.14.1005.4537.2024.016 DOI: 10.11902/1005.4537.2024.016

研究报告

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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

王承涛¹, 申冠一², 许少毅²(

), 李威², 王禹桥², 王树臣¹, 闻东东¹, 李朋宇³

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

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

WANG Chengtao¹, SHEN Guanyi², XU Shaoyi²(

), LI Wei², WANG Yuqiao², WANG Shuchen¹, WEN Dongdong¹, LI Pengyu³

1. School of Electrical and Control Engineering, Xuzhou University of Technology, Xuzhou 221018, China
2. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
3. Bozhou Power Supply Company, State Grid Anhui Electric Power Co., Ltd., Bozhou 236800, China

引用本文:

王承涛, 申冠一, 许少毅, 李威, 王禹桥, 王树臣, 闻东东, 李朋宇. 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[J]. 中国腐蚀与防护学报, 2024, 44(6): 1573-1580.
Chengtao WANG, Guanyi SHEN, Shaoyi XU, Wei LI, Yuqiao WANG, Shuchen WANG, Dongdong WEN, Pengyu LI. Numerical Simulation of Corrosion of Buried Metal Pipeline Under AC Interference Based on Physical Field Coupling[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(6): 1573-1580.

全文: PDF(3507 KB) HTML

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。

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

Abstract：

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.

Key words： stray current AC corrosion corrosion simulation buried metal pipeline AC electrified traction

收稿日期: 2024-01-10 32134.14.1005.4537.2024.016

ZTFLH:

TG172

基金资助:江苏省自然科学基金(BK20221120)

通讯作者: 许少毅，E-mail：shaoyi@cumt.edu.cn，研究方向为光纤电流传感，地铁杂散电流腐蚀监测

Corresponding author: XU Shaoyi, E-mail: shaoyi@cumt.edu.cn

作者简介: 王承涛，男，1993年生，博士，讲师

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	王承涛
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	李朋宇
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链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2024.016 或 https://www.jcscp.org/CN/Y2024/V44/I6/1573

图1 埋地金属管线交流杂散电流腐蚀仿真三维模型

表1 交流杂散电流腐蚀仿真极化动力学参数

表2 仿真模型组件材料参数

图2 交流杂散电流腐蚀仿真模型的自由四面体网格划分

图3 轨道交通交流牵引曲线

图4 一个周期内土壤电解质电位分布(x-z平面)

图5 一个周期内不同时刻钢轨电位分布

图6 一个周期内不同时刻埋地金属管道表面电流密度分布

图7 不同埋地深度下的埋地金属管线表面电流密度分布

图8 不同铺设角度下的埋地金属管线交流杂散电流腐蚀仿真模型

图9 不同铺设角度下的埋地金属管线表面电流密度分布

图10 埋地管线不同位置下表面电流密度分布

图11 不同运行时刻下的电解质电位分布(y-z平面)

图12 不同时刻下的钢轨电位分布

图13 不同运行时刻下的埋地金属管道表面电流密度分布

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