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| Corrosion Behaviors of Aluminum Alloys in Different Harbors |
| Received:October 19, 2018 Revised:April 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.04.002 |
| KeyWord:harbor marine organisms aluminum alloy corrosion |
| Author | Institution |
| PENG Wen-shan |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| HOU Jian |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| YU Hua-long |
2. Unit 91922, PLA, Sanya , China |
| DING Kang-kang |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| FAN Lin |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| GUO Wei-min |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| LIN Cun-guo |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
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| Abstract: |
| Objective To obtain corrosion regularity of 1060 aluminum alloy and 5083 aluminum alloy in different harbors. Methods The real-sea test was carried out to obtain the corrosion morphology and corrosion rate of the material surface, and corrosion image processing techniques were used to analyze the marine organisms cover status. Results There are different kinds of marine organisms attached to the surface of aluminum alloy specimens in different harbors. The surfaces of the specimens at Qingdao harbor were mainly attached by oysters. The surfaces of the specimens at Zhoushan harbor were mainly attached by barnacles and seaweeds. The surfaces of the specimens at Sanya harbor were mainly attached by barnacles and oysters. The corrosion form of 1060 aluminum alloy and 5083 aluminum alloy were mainly pitting corrosion and crevice corrosion in different harbors. The adhesion of marine organisms had significant impacts on corrosion of aluminum alloys. The serious corrosion areas appeared under the oysters or barnacles, or near the edges of the sea creatures and material matrix. The sequence of the corrosion rates of the two aluminum alloys in the three harbors from the largest to the lowest was: Zhoushan Harbor, Sanya Harbor, and Qingdao Harbor. The sea creature coverage area of aluminum alloy specimens in different harbors was different. The sequence of the sea creature cover area of the two aluminum alloys in the three harbors from the largest to the lowest was: Sanya Harbor, Qingdao Harbor, and Zhoushan Harbor. Conclusion The species of marine organisms and the sea creature coverage area on the surface of aluminum alloy specimens of these three harbors are significantly different due to different seawater environments. To a certain extent, the adhesion of sea creatures slows down the corrosion of aluminum alloys. However, it also makes the aluminum alloys easier to produce crevice corrosion and pitting corrosion. |
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