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| FPSO Protection Scheme Based on Impressed Current Cathodic Protection (ICCP) |
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| DOI：10.7643/issn.1672-9242.2022.05.013 |
| KeyWord:cathodic protection numerical simulation FPSO impressed current cathodic protection (ICCP) auxiliary anode boundary element method (BEM) optimization design |
| Author | Institution |
| FENG Jia-quan |
Dalian university of Technology, Liaoning Dalian , China |
| ZHANG Xue-hui |
Shanghai Waigaoqiao Shipbuilding Co., Ltd., Shanghai , China |
| SONG Shi-de |
Dalian university of Technology, Liaoning Dalian , China |
| HUANG Yi |
Dalian university of Technology, Liaoning Dalian , China |
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| Abstract: |
| This paper is to determine the optimal parameters of impressed current cathodic protection system under the whole life cycle of the main hull structure of the target FPSO. The impressed current cathodic protection model of the main hull structure of the target FPSO is established by numerical simulation with computer software, and the influence of the position, quantity and output current of the auxiliary anodes in the impressed current cathodic protection system on the protection state of the target FPSO is studied. Eight auxiliary anodes are symmetrically arranged on the left and right sides at 57, 127, 191 and 267 m from the aft of the target FPSO and the intake depth is 5.3, 5.7, 5.7 and 5.2 m respectively. The initial release current of each auxiliary anode is 7, 6, 6 and 6 A respectively. The total output current of the impressed current cathodic protection system increases linearly at 34.6 A per year, which makes the underwater part of the main hull structure of the target FPSO in a fully protected state during its whole life. The relationship between the parameters of the impressed current cathodic protection system and the protection status of the target FPSO can be quickly obtained by numerical simulation with computer software, and then the optimal parameters of the cathodic protection can be obtained, which provides a theoretical basis for the subsequent use of the impressed current cathodic protection system on the target FPSO to establish the optimal parameters. |
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