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| Local Potential Monitoring and Reference Electrode Stability of Steel Shell Concrete Structures in Marine Environment |
| Received:January 17, 2023 Revised:April 04, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.07.015 |
| KeyWord:reference electrode stability steel shell sinking tube marine monitoring |
| Author | Institution |
| WANG Hai-feng |
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Liaoning Dalian , China |
| LI Xin-cheng |
Dalian Kingmile Anticorrosion Technology Co., Ltd., Liaoning Dalian , China |
| QIN Tie-nan |
Dalian Kingmile Anticorrosion Technology Co., Ltd., Liaoning Dalian , China |
| ZHANG Xin-yu |
Dalian Kingmile Anticorrosion Technology Co., Ltd., Liaoning Dalian , China |
| FENG Jia-quan |
Dalian Kingmile Anticorrosion Technology Co., Ltd., Liaoning Dalian , China |
| SONG Shen-you |
Shenzhen-Zhongshan Link Administration Center, Guangdong Zhongshan , China |
| HUANG Yi |
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Liaoning Dalian , China |
| XU Yun-ze |
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Liaoning Dalian , China;State Key Laboratory of Structural Analysis for Industrial Equipment, Liaoning Dalian , China |
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| Abstract: |
| The work aims to compare the stability of three reference electrodes made of high-purity zinc, titanium and platinum under various working conditions, and further determine where these electrodes should be positioned in the sinking tube for better performance. With the potential data measured through the Ag/AgCl reference electrode as the actual potential reference, the potential of the steel shell at different locations of the sinking tube was continuously monitored by the potential sensors installed in different areas for more than 9 mouths. The potential measured by the high-purity zinc reference electrode was close to the actual potential of the steel shell, and the change of the environment had little affect to the monitored results. Therefore, the high-purity zinc reference electrode could be used for the accurate measurement of the cathodic protection potential of steel shell surface. On the other side, the potential monitored by the platinum and titanium reference electrodes were stable under the environment of the sea mud/throwing stone at the bottom of the steel shell. However, the accuracy of these two electrodes could be easily affected by the oxidizing medias such as the dissolve oxygen, the metal ions, etc., resulting in large deviations in the measurement results. Therefore, high-purity zinc reference electrode is more suitable for long-term monitoring of cathodic protection potential on the side of the sinking tube, while platinum and titanium reference electrodes are more suitable for long-term measurement of protection potential at the bottom of the steel shell. |
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