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| Numerical Simulation Research on Galvanic Effect of Simulating Seawater Pipeline |
| Received:January 22, 2021 Revised:March 22, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.04.016 |
| KeyWord:sea water pipeline galvanic corrosion numerical simulation |
| Author | Institution |
| ZHANG Yu |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| LI Xiang-bo |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| LIU Guang-yi |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| LI Kai-wei |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| TAN Zhen-jiang |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| HOU Jian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
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| Abstract: |
| This paper aims to study the potential and corrosion current density distribution between the titanium alloy simulated seawater pipeline and the ship hull under different electrical connections and clarify the anti-corrosion measures. Aiming at the titanium alloy simulating seawater pipeline and hull structure, a simulation model was established based on finite element to carry out the numerical simulation calculation of the galvanic effect of the two, focusing on the electrical connection state of the titanium alloy simulating seawater pipeline and hull structure, the insulation state of the contact interface, and the potential of the insulation state of all structural units. The distribution of current density and current density play a guiding role in suppressing galvanic corrosion in actual projects. The simulation results show that when the hull steel is electrically connected to the titanium alloy pipeline system, the hull steel is in a state of accelerated corrosion, and the corrosion at the interface with the seawater pipeline is the most serious, while the seawater pipeline is in a cathodic protection state. When the seawater pipeline structure is insulated from the hull structure, both the hull and seawater pipeline appear to be self-corrosive, and there is no galvanic corrosion between the two systems. When the seawater pipeline structure is insulated from the hull structure and the seawater pipeline and the units are also insulated, each unit of the ship's hull and pipeline seawater piping is in a self-corrosive state, and there is no galvanic corrosion between the two systems and between the seawater pipeline units. The electrical connection of titanium alloy piping and hull steel will cause galvanic corrosion of hull steel, especially at the interface between the two, where the corrosion is the most serious. The insulation treatment between dissimilar metals can prevent the occurrence of galvanic corrosion, and only needs to insulate the dissimilar metals, and there is no need to insulate the structures of the same material. |
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