Seawater pipeline corrosion monitoring system based on AC impedance technology

Zhang Xiaodong; Xu Zhixiong; Zhang Cong; Gao Xinhua; Chi Ying

doi:10.19693/j.issn.1673-3185.01320

Volume 14 Issue 4

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Chinese Journal of Ship Research > 2019 > 14(4): 155-160. > DOI: 10.19693/j.issn.1673-3185.01320 CSTR: 32390.14.j.issn.1673-3185.01320

Zhang Xiaodong, Xu Zhixiong, Zhang Cong, Gao Xinhua, Chi Ying. Seawater pipeline corrosion monitoring system based on AC impedance technology[J]. Chinese Journal of Ship Research, 2019, 14(4): 155-160. DOI: 10.19693/j.issn.1673-3185.01320

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Seawater pipeline corrosion monitoring system based on AC impedance technology

1.
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China
2.
China Ship Development and Design Center, Wuhan 430064, China

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Received Date: June 15, 2018
Available Online: May 07, 2021

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Objectives The installation of an insulating spacer is an important measure to prevent electrochemical corrosion between seawater dissimilar metal pipelines. The electrical insulation performance of the insulating spacer reflects the degree of electrochemical corrosion between seawater pipelines.
Methods On the basis of the AC impedance technology, this paper designs and develops a system for monitoring electrical insulation performance between seawater dissimilar metal pipelines. The system mainly includes power module, microcontroller module, Direct Digital Synthesizer(DDS)signal generator and communication module, and upper computer software, and the measurement accuracy is verified with high-precision instruments.
Results The results show that the electrical insulation performance monitoring system has a high measurement accuracy, and the measurement error of the insulation resistance below 10 MΩ is within 5%.
Conclusions The electrical insulation performance monitoring system suitable for both dry and wet states is realized, which meets the actual application requirements.
- seawater dissimilar metal pipeline,
- AC impedance,
- electrical insulation performance,
- Direct Digital Synthesizer (DDS)

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