Causes and countermeasures of corrosionin steel fishing vessel

We discuss the mechanism ofcorrosion in steel fishing vessel mainly caused by electrochemical corrosion, and the primary cause is voltage gradient producing electric current. Besides, we compare sacrificial anodes protection method and impressed current protection method in the aspects of technology, installation, system maintenance and economy. Based on the numerical simulation conducted for impressed current protection in the case of fishing vessel berthing, we establish an electrostatic field numerical model by the software ANSYS, and use boundary element method (BEM) to solve potential distribution problem. Thus, new strategies are proposed to eliminate electrochemical corrosion in berthing steel fishing vessel.