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| Numerical Simulation and Optimization of Ballast Tank’ s Cathodic Protection System |
| Received:July 18, 2010 Revised:February 15, 2011 |
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| DOI： |
| KeyWord:ballast tank sacrificial anode boundary element method |
| Author | Institution |
| XING Shao-hua |
State Key Laboratory for Marine Corrosion and Protection，Luoyang Ship Material Research Institute，Qingdao ，China |
| PENG Yan-lei |
State Key Laboratory for Marine Corrosion and Protection，Luoyang Ship Material Research Institute，Qingdao ，China |
| ZHANG Fan |
State Key Laboratory for Marine Corrosion and Protection，Luoyang Ship Material Research Institute，Qingdao ，China |
| XU Li-kun |
State Key Laboratory for Marine Corrosion and Protection，Luoyang Ship Material Research Institute，Qingdao ，China |
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| Abstract: |
| The sacrificial anode protection system designed by experience easily leads to under-protect or over-protect because of the complexity and current shield effect of ballast tank. So, improper design of sacrificial anode number and position is one of the main causes of the ballast tank corrosion problem. In order to solve this problem, the potential distribution and optimization study was carried out based on boundary element method (BEM). The results showed that the numerical ballast tank model established by BEM can accurately simulate the protection potential distribution. The optimized sacrificial anode system can supply more effective and uniform protection to ballast tank, furthermore, although the potential changed bigger due to the sacrificial anodes dissolving and coating scrap and degrading, it was still under -800mV after five years, that is to say the ballast tank was well protected. |
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