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| A Detection Method for Corrosion Prevention Status of Submarine Pipelines |
| Received:September 29, 2020 Revised:October 11, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.01.016 |
| KeyWord:corrosion prevention status detection potential difference potential gradient numerical simulation |
| Author | Institution |
| SUN Yu |
Dalian University of Technology, Dalian , China |
| CHANG Wei |
CNOOC Research Institute Co., Ltd., Beijing , China |
| YANG Xiang-kun |
Dalian University of Technology, Dalian , China |
| HU Li-hua |
CNOOC Research Institute Co., Ltd., Beijing , China |
| YU Xiao-yi |
CNOOC Research Institute Co., Ltd., Beijing , China |
| SONG Shi-de |
Dalian University of Technology, Dalian , China |
| HUANG Yi |
Dalian University of Technology, Dalian , China |
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| Abstract: |
| A non-contact detection method for the corrosion protection status of submarine pipelines is introduced, and the feasibility of this detection method based on the measurement of the remote reference electrode potential difference is verified. The principle of the non-contact detection method based on the measurement of the remote reference electrode potential difference is discussed, the potential of the 964.6 m long submarine pipelines is simulated and calculated by the numerical simulation software, and the distribution law of the overall potential of the submarine pipelines buried within 200 m water depth under 5 different working conditions is analyzed. The more uniform the distribution of the effective sacrificial anodes in the submarine pipelines is and the farther they are away from the pipelines, the more consistent the overall potential distribution of the pipelines is and the more accurate the pipeline protection potential detection based on this method is; the more seriously the pipeline corrosion protection layer is damaged, the better the detectability of the sacrificial anodes is. The environmental electric field gradient around the submarine pipelines at the end of their design life is large, which provides a theoretical basis for the non-contact detection method based on the measurement of the remote reference electrode potential difference and confirms the effectiveness of this detection method. |
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