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| Analysis of Galvanic Corrosion Behavior of Stainless Steel and Hull Steel in Seawater |
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| DOI：10.7643/issn.1672-9242.2022.05.016 |
| KeyWord:stainless steel hull steel galvanic corrosion corrosion rate electrochemical area ratio of anode and cathode |
| Author | Institution |
| XU Qiang |
Marine Design & Research Institute of China, Shanghai , China |
| LIU Ya-peng |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China |
| HU Peng-fei |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China;School of Materials Science and Engineering, China University of Petroleum, Shandong Qingdao , China |
| WANG Pei |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China |
| ZHANG Yu |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China |
| ZHANG Hui-xia |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China |
| LI Xiang-bo |
State Key Laboratory for Marine Corrosion and Protection, China Shipbuilding Industry 725 Research Institute, Shandong Qingdao , China |
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| Abstract: |
| In order to provide data support for the application of stainless steel, this paper carried out a study on the galvanic corrosion behavior of stainless steel and ship hull steel in natural seawater. Electrochemical equipment was used to study the self-corrosion and galvanic corrosion behaviors of stainless steel and ship hull steel in natural seawater, and combined with the weight loss and corrosion morphology, the influence of the area ratio of cathode and anode on the sensitivity of galvanic corrosion was studied. The results show that the self-corrosion potential of the two metals differs by 600 mV, and the galvanic corrosion tendency is serious. When galvanic corrosion occurs between the two metals, stainless steel serves as the cathode and the hull steel serves as the anode. As the area ratio between the anode and cathode decreases, the corrosion rate and average corrosion depth of the hull steel decrease; the corrosion morphology of stainless steel is not affected by the area ratio. Therefore, in actual engineering, the effect of galvanic corrosion can be reduced by increasing the area of the anode material. |
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