Petroleum Science >2016,??Issue 1:??135-145 DOI: https://doi.org/10.1007/s12182-015-0064-3
The influence of DC stray current on pipeline corrosion Open?Access
文章信息
作者：Gan Cui,Zi-Li Li,Chao Yang and Meng Wang
作者单位：
College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China;College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China;College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China;College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China
投稿时间：2015-12-25
引用方式：Cui, G., Li, ZL., Yang, C. et al. Pet. Sci. (2016) 13: 135. https://doi.org/10.1007/s12182-015-0064-3
文章摘要
DC stray current can cause severe corrosion on buried pipelines. In this study, ?rstly, we deduced the equation of DC stray current interference on pipelines. Next, the cathode boundary condition was discretized with pipe elements, and corresponding experiments were designed to validate the mathematical model. Finally, the numerical simulation program BEASY was used to study the corrosion effect of DC stray current that an auxiliary anode bed generated in an impressed current cathodic protection system. The effects of crossing angle, crossing distance, distance of the two pipelines, anode output current, depth, and soil resistivity were investigated. Our results indicate that pipeline crossing substantially affects the corrosion potential of both protected and unprotected pipelines. Pipeline crossing angles, crossing distances, and anode depths, our results suggest, have no signi?cant in?uence. Decreasing anode output current or soil resistivity reduces pipeline corrosion gradually. A reduction of corrosion also occurs when the distance between two parallel pipelines increases.
关键词
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DC stray current BEASY Numerical simulation DC interference corrosion