Study on AC Stray Current Corrosion Law of Buried Steel Pipelines

Abstract:

AC stray current can cause AC corrosion and destroy the safe operation of buried pipelines, which comes mainly from nearby high voltage transmission lines and AC electric railway. The research and evaluation lags far behind DC stray current at home and abroad, besides, the AC current density measuring procedures are complex. Through experimental study of different parameters on the impact of the AC current density established a mathematical model of damaged area, soil resistivity, pipe-to-soil potential and coating resistivity. With it can indirectly get the AC current density, which improve efficiency by simplifying the measuring procedures. Also, provide a basis for harmfulness evaluation of AC stray current by studying the impact of AC current density on the corrosion rate.

• Periodical: Applied Mechanics and Materials (Volumes 263-266)
• Pages: 448-451
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.263-266.448
• Online since: December 2012
• Authors: Xin Hua Wang, Guo Yong Yang, Hai Huang, Zhenhua Chen, Li Mei Wang
• Keywords: AC Stray Current, Buried Steel Pipelines, Corrosion Law, Harmfulness Evaluation

References

[1] Yinshun. Wu, Bei Cao, in: 'Cathodic protection and anodic protection - principles, techniques and engineering applications', Beijing Sinopec Press (2007).

[2] Hayden J L R. Alternating current electrolysis. AIEE Trans (1907)

[3] Yinwei Song, Xinhua Wang, Renyang He, etal: Corrosion & Protection (2009)

[4] G.Y. Yin, Z.H. Wei: MELDED PIPE AND TUBE (2008)

[5] J.B. GONG, N.X. XU, C.D. ZHANG: Journal of Chinese Society For Corrosion and Protection (1998)

[6] G.C. Christoforidis , D.P. Labridis, P.S. Dokopoulos: Electric Power Systems Research (2003)

[7] SY/T 0420-1997. Technology standard of petroleum asphalt coating for buried steel pipeline (1997)

[8] GB/T 23257-2009. Polyethylene coating for buried steel pipeline (2009)