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A Study on the Problem of AC Corrosion of Power Umbilical Cables Caused by Electromagnetic Induction Phenomena

Author

Listed:
  • Pengjin Shao

    (Zhongtian Technology Submarine Cables Co., Ltd., Nantong 226000, China)

  • Haijun Li

    (Zhongtian Technology Submarine Cables Co., Ltd., Nantong 226000, China)

  • Pan Pan

    (Zhongtian Technology Submarine Cables Co., Ltd., Nantong 226000, China)

  • Qibing Shao

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China)

  • Zhen Li

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China)

  • Jiaming Yang

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China)

Abstract

During the normal laying and operation of a three-core umbilical cable, AC current can easily lead to AC electrochemical corrosion on the outer surface of the steel tube. To explore the electrochemical corrosion mechanism and the factors affecting the three-core umbilical cable, this paper optimizes the internal induced potential calculation method for three-core umbilical cables. It analyzes the changes in the characteristics of the induced potential and explores the variations in the density of induced current under different conditions. The research results show that by optimizing the calculation method for the induction potential of the umbilical cable’s steel pipe, for the electromagnetic significance of the smallest repeating unit, the induction potential on the steel pipe’s surface exhibited a cyclic change. The peak part of the induction potential is most likely to experience electrochemical corrosion. Additionally, reducing the radius of the outer insulation aperture of the steel pipe and improving the conductivity of seawater will increase the density of the induced current in the insulation aperture, thereby increasing the risk of electrochemical corrosion. As the cable pitch and AC frequency increase, the current density in the steel pipe pores will also rise.

Suggested Citation

  • Pengjin Shao & Haijun Li & Pan Pan & Qibing Shao & Zhen Li & Jiaming Yang, 2024. "A Study on the Problem of AC Corrosion of Power Umbilical Cables Caused by Electromagnetic Induction Phenomena," Energies, MDPI, vol. 17(14), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:14:p:3588-:d:1439757
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