地铁杂散电流干扰下埋地金属管道镁阳极排流技术研究  

Application of Magnesium Sacrificial Anode for Mitigation of Metro Stray Current on Buried Metallic Pipeline:Field Test and Design

作　　者：唐德志 陈宏健[1] 杜艳霞[3] 付勇[1,2] 谷坛 路民旭[3] TANG Dezhi;CHEN Hongjian;DU Yanxia;FU Yong;GU Tan;LU Minxu(Petro China Planning ＆ Engineering Institute,Beijing 100083,China;Beijing Lingyi Science ＆ Technology Co.,Ltd.,Beijing 100083,China;Corrosion and Protection Center,University of Science ＆ Technology Beijing,Beijing 100083,China)

机构地区：[1]中国石油天然气股份有限公司规划总院,北京100083 [2]北京市凌怡科技有限公司,北京100083 [3]北京科技大学腐蚀与防护中心,北京100083

出　　处：《腐蚀科学与防护技术》2018年第6期577-584,共8页Corrosion Science and Protection Technology

基　　金：国家重点研发计划项目(2016YFC0802101和2016YFC0802103)~~

摘　　要：利用现场实验和理论分析相结合的方法进行了地铁杂散电流干扰下埋地金属管道镁合金牺牲阳极排流技术的应用研究。结果表明,干扰状态下当管道电位正向不超过+1.5 VCSE时,镁合金牺牲阳极可以有效地抑制地铁杂散电流干扰,但其保护范围有限,在几十米到一两百米之内,且其有效保护距离随着管道干扰水平的增加而减小。基于现场实验结果,同时结合理论推导,对镁合金牺牲阳极有效保护距离的预测方法进行探讨,初步建立了地铁杂散电流干扰下埋地金属管道镁合金牺牲阳极排流有效保护距离的预测模型,可供管道地铁杂散电流干扰的防护设计参考。The dramaticaly developing metro system in urbans interferes with buried metallic pipelines nearby in terms of stray current. In this work, application of magnesium sacrificial anode for mitigating the interference of metro stray current to the buried metallic pipeline was investigated by field test and theoretical analysis. The results showed that the interference of metro stray current to the buried pipeline could be controlled effectively by applying magnesium sacrificial anode when the noble potential of pipeline-to-earth is below ＋ 1.5 VCSE, however, of which the effective protection range was within a range of two hundred meters. Besides, it decreased with the increasing stray current. Based on the above results and the theoretical consideration, a model was proposed for predicting the effective protection range of magnesium sacrificial anode drainage for the pipeline subjected to tray current interference.

关 键 词：地铁杂散电流干扰 油气管道 镁阳极排流 现场研究 有效保护距离 预测模型 

分 类 号：TE830[石油与天然气工程—油气储运工程]