Volume 3, Issue 1, June 2019, Page: 9-14
Electrochemical Corrosion Study of Buried Pipeline Steel X20 Affected by Stray Current
Fangfang Xing, School of Mechatronic Engineering, Xuzhou College of Industrial Technology, Xuzhou, China
Chengtao Wang, School of Mechatronic Engineering, Department of Mechanical Electronics, China University of Mining and Technology, Xuhou, China
Received: Sep. 5, 2019;       Accepted: Sep. 21, 2019;       Published: Oct. 9, 2019
DOI: 10.11648/j.ajaic.20190301.12      View  597      Downloads  88
Abstract
With the continuous development of urban city, more and more subway lines are applied in the urban rail transit systems. During the daily operation of metro, the insulation performance between running rails and earth is gradually decreased. Thus, the stray current is generated at where the current flows out of the running rail. Stray current leakage and the corrosion caused by it are not negligible negative effects. Stray current corrosion will cause severe electrochemical corrosion to the metallic structures in and around the subway system, such as buried pipelines, running rails and concrete reinforcement etc. In view of the current situation of buried pipelines being affected by stray current corrosion, this paper starts with the stray current corrosion experiment of X20 pipeline steel. The experimental system was built up to simulate the stray current corrosion on the buried metallic pipeline. Electrochemical measurements including Tafel method and electrochemical impedance spectrum (EIS) were conducted in this study. Based on the measurement results and microscope morphology, the electrochemical corrosion process of X20 steel was discussed in detail Then the equivalent circuit model of the corrosion system was fitted and analyzed. It was found that the Nyquist plot of X20 corrosion system shows the characteristics of double capacitive reactance arc, and the corrosion system can be equivalent to a Rs(CPEporeRpore)(CPEdlRct) model. Finally, the stray current corrosion in the subway was introduced with engineering background, in which more influencing factors including microorganism, tube pressure, pH and water content value of soil, are pointed out for future research.
Keywords
Stray Current, Electrochemical Corrosion, X20 Steel, Pipeline Steel, Subway
To cite this article
Fangfang Xing, Chengtao Wang, Electrochemical Corrosion Study of Buried Pipeline Steel X20 Affected by Stray Current, American Journal of Applied and Industrial Chemistry. Vol. 3, No. 1, 2019, pp. 9-14. doi: 10.11648/j.ajaic.20190301.12
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Sim, W. M., & Chan, C. F. (2004). Stray current monitoring and control on Singapore MRT system. International Conference on Power System Technology. IEEE.
[2]
Memon, S. A., & Fromme, P. (2014). Stray current corrosion and mitigation: a synopsis of the technical methods used in dc transit systems. IEEE Electrification Magazine, 2 (3), 22-31.
[3]
Mo, S., Yang, S., Lu, X., Zhang, J., Liu, Y., & Liu, X., et al. (2013). Investigation of Dynamic Stray Current Interference from Direct Current System with City Pipelines. International Conference on Pipelines & Trenchless Technology.
[4]
Alamuti, M. M., Nouri, H., & Jamali, S. (2011). Effects of earthing systems on stray current for corrosion and safety behaviour in practical metro systems. IET Electrical Systems in Transportation, 1 (2), 69-0.
[5]
Wang, J., Li, Z., Cui, G., Liu, J. G., Kong, C., & Wang, L., et al. (2019). Corrosion behaviors of X70 steel under direct current interference. Anti-Corrosion Methods and Materials.
[6]
Chen, Z. G., Qin, C. K., Tang, J. X., & Zhou, Y. (2013). Experiment research of dynamic stray current interference on buried gas pipeline from urban rail transit. Journal of Natural Gas Science and Engineering, 15 (Complete), 76-81.
[7]
Law, D. W., Cairns, J., Millard, S. G., & Bungey, J. H. (2004). Measurement of loss of steel from reinforcing bars in concrete using linear polarisation resistance measurements. NDT and E International, 37 (5), 381-388.
[8]
Ibrahim, & Emad, S. (1999). Corrosion control in electric power systems. Electric Machines & Power Systems, 27 (8), 795-811.
[9]
Brichau, F., Deconinck, J., Driesens, T. (1996) Modeling of underground cathodic protection stray currents. Corrosion, 52: 480-487.
[10]
Uhlig, H. H., & King, C. V. (1972). Corrosion and corrosion control. Journal of The Electrochemical Society, 119 (12), 327C.
[11]
Yu, J. G., & Goodman, C. J. (1990). Modelling of rail potential rise and leakage current in DC rail transit systems. IEEE Colloquium on Stray Current Effects of Dc Railways & Tramways. IET.
[12]
Chen, Z., Qin, C., Zhang, Y., & Guo, C. (2010). Design and application of a stray current monitoring system. International Conference on Computer. IEEE.
[13]
K. Żakowski, & W. Sokólski. (1999). 24-hour characteristic of interaction on pipelines of stray currents leaking from tram tractions. Corrosion Science, 41 (11), 2099-2111.
[14]
Darowicki, K., & Zakowski, K. (2004). A new time–frequency detection method of stray current field interference on metal structures. Corrosion Science, 46 (5), 0-1070.
[15]
Liwei, Z., Bingkun, Y., Min, L., Jiaxiu, H. U., & Zhouhai, Q. (2016). Stray current corrosion behavior of q235 carbon steel grounding material. Journal of Hebei University (Natural Science Edition).
[16]
Jiang, L., Hua, T., & Xue, Y. H. (2002). Protection of stray current corrosion in metro. Journal of Building Materials.
[17]
Xu, S. Y., Li, W., & Wang, Y. Q. (2013). Effects of vehicle running mode on rail potential and stray current in dc mass transit systems. IEEE Transactions on Vehicular Technology, 62 (8), 3569-3580.
[18]
Bertolini, L., Carsana, M., & Pedeferri, P. (2007). Corrosion behaviour of steel in concrete in the presence of stray current. Corrosion Science, 49 (3), 0-1068.
[19]
Li, W., & Yan, X. (2001). Research on integrated monitoring and prevention system for stray current in metro. Journal of China University of Mining & Technology, 11 (2), 221-228.
[20]
S. Qian, Y. F. Cheng, (2017). Accelerated corrosion of pipeline steel and reduced cathodic protection effectiveness under direct current interference, Constr. Build. Mater. 148 675-685.
[21]
Evans, C., Leiva-Garcia, R., & Akid, R. (2018). Strain evolution around corrosion pits under fatigue loading. Theoretical and Applied Fracture Mechanics, 95, 253-260.
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