This paper diagnosis the effect of the AC current densities induced by the electromagnetic interference between high voltage power line and buried power line on the cathodic protection performance of the X70 steel in simulated soil. First, the induced AC voltage onto the pipeline was calculated for different power line configuration, separation distances between transmission line and pipeline and parallelism lengths. The induced AC current density was calculated function to the induced AC voltage, soil resistivity, and holiday diameter. Then, the electrochemical characters of the X70 steel at various AC current densities are measured using the potentiodynamic method. The electrochemical parameters obtained by the electrochemical tests are used as boundary conditions in the cathodic protection simulation model. The results indicate that, under influence of AC current densities, the X70 steel is more susceptible to corrosion, and the cathodic protection is unable to maintain the protection potential.
2. Gupta, A. and M. J. Thomas, "Coupling of high voltage AC power lines fields to metallic pipelines," 9th International Conference on Electro Magnetic Interference and Compatibility, INCEMIC, Bangalore, India, February 23-24, 2006.
3. Saied, M. M., "The capacitive coupling between EHV lines and nearby pipelines," IEEE Transactions on Power Delivery, Vol. 19, No. 3, 1225-1231, 2004.
4. Braunstein, R., E. Schmautzer, and M. Oelz, "Impacts of inductive and conductive interference due to high-voltage lines on coating holidays of isolated metallic pipelines," 21st International Conference on Electricity Distribution, 13, Frankfurt, Germany, June 2011.
5. Kopsidas, K. and I. Cotton, "Induced voltages on long aerial and buried pipelines due to transmission line transients," IEEE Trans. Power Del., Vol. 23, No. 3, 1535-1543, July 2008.
6. Cotton, I., K. Kopsidas, and Y. Z. Elton, "Comparison of transient and power frequency-induced voltages on a pipeline parallel to an over-head transmission line," IEEE Trans. Power Del., Vol. 22, No. 3, 1706-1714, July 2007.
7. Dawalibi, F. P. and R. D. Southey, "Analysis of electrical interference from power lines to gas pipelines, part II - Parametric analysis," IEEE Trans. Power Del., Vol. 5, No. 1, 415-421, January 1990.
8. Hanafy, M. I., "Effect of oil pipelines existing in an HVTL corridor on the electric-field distribution," IEEE Trans. Power Del., Vol. 22, No. 4, 2466-2471, 2007.
9. Zhang, R., P. R. Vairavanathan, and S. B. Lalvani, "Perturbation method analysis of AC-induced corrosion," Corrosion Science, Vol. 50, 1664-1671, 2008.
10. Goidanich, S., L. Lazzari, and M. Ormellese, "AC corrosion. Part 1: Effects on overpotentials of anodic and cathodic processes," Corrosion Science, Vol. 52, 491-497, 2010.
11. Goidanich, S., L. Lazzari, and M. Ormellese, "AC corrosion. Part 2: Parameters influencing corrosion rate," Corrosion Science, Vol. 52, 916-922, 2010.
12. Xu, L. Y., X. Su, Z. X. Yin, Y. H. Tang, and Y. F. Cheng, "Development of a real time AC/DC data acquisition technique for studies of AC corrosion of pipelines," Corrosion Science, Vol. 61, 215-223, 2012.
13. Nielsen, L. V. and F. Galsgaard, "Sensor technology for on-line monitoring of AC-induced corrosion along pipelines," Corrosion'2005, Paper No. 05375, NACE, Houston, USA, 2005.
14. Fu, A. Q. and Y. F. Cheng, "Effect of alternating current on corrosion and effectiveness of cathodic protection of pipelines," Can. Metall. Q., 81-90, 2012.
15. Song, H. S., Y. G. Kim, S. M. Lee, and Y. T. Kho, "Competition of AC and DC current in AC corrosion under cathodic protection," Corrosion'2002, Paper No. 02117, NACE, Houston, 2002.
16. Nielsen, L. V., "Role of alkalization in AC induced corrosion of pipelines and consequences hereof in relation to CP requirements," Corrosion'2005, Paper No. 05188, NACE, Houston, USA, 2005.
17. Xu, L. Y., X. Su, and Y. F. Cheng, "Effect of alternating current on cathodic protection on pipelines," Corrosion Science, Vol. 66, 263-268, 2013.
18. Ouadah, M., M. Zergoug, A. Ziouche, O. Touhami, R. Ibtiouen, S. Bouyegh, and C. Dehchar, "AC corrosion induced by high voltage power line on cathodically protected pipeline," Proceedings Engineering & Technology (PET), Vol. 7, 2356-5608, 2014.
19. Nielsen, L. V., "Role of alkalization in AC induced corrosion of pipelines and consequences hereof in relation to CP requirements," Corrosion'2005, Paper No. 05188, NACE, Houston, USA, 2005.
20. Xu, L. Y., X. Su, and Y. F. Cheng, "Effect of alternating current on cathodic protection on pipelines," Corrosion Science, Vol. 66, 263-268, 2013.
21. Braunstein, R., E. Schmautzer, and G. Propst, "Comparison and discussion on potential mitigating measures regarding inductive interference of metallic pipelines," Proceedings of ESARS, Bologna, Italy, October 2010.
22. Hossam-Eldin, A., W. Mokhtar, and E. M. Ali, "Effect of electromagnetic fields from power lines on metallic objects and human bodies," International Journal of Electromagnetic and Applications 2012, Vol. 2, No. 6, 151-158, 2012.