Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment
The corrosion behavior of 2A12 and 5A02 aluminum alloys in Wenchang marine atmospheric environment was systematically investigated by means of macroscopic morphology observation, microscopic corrosion morphology analysis, pitting analysis, weight loss analysis and electrochemical measurements. Exper...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425013092 |
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| author | Shuai Wu Cong Liu Kun Zhou Ying Li Zequn Zhang Bowei Zhang Junsheng Wu |
| author_facet | Shuai Wu Cong Liu Kun Zhou Ying Li Zequn Zhang Bowei Zhang Junsheng Wu |
| author_sort | Shuai Wu |
| collection | DOAJ |
| description | The corrosion behavior of 2A12 and 5A02 aluminum alloys in Wenchang marine atmospheric environment was systematically investigated by means of macroscopic morphology observation, microscopic corrosion morphology analysis, pitting analysis, weight loss analysis and electrochemical measurements. Experimental results demonstrated that both alloys exhibited pronounced pitting corrosion, with corrosion products primarily consisting of Al2O3 and AlO(OH). After 48 months of outdoor exposure, 5A02 developed a 25 μm-thick corrosion product layer, while 2A12 displayed a significantly thicker layer (70 μm) accompanied by greater average pitting depth and pit density. Corrosion rates for both alloys followed a similar trend of initially increasing, then decreasing and finally stabilizing, the maximum corrosion rate for 2A12 (32.57 g/m2/a) far exceeded that of 5A02 (2.04 g/m2/a). Electrochemical analysis revealed progressive enhancement of corrosion resistance over time for both alloys, evidenced by increasing polarization resistance (Rp) values. Throughout the exposure period, 5A02 consistently maintained higher Rp values compared to 2A12, conclusively demonstrating its superior corrosion resistance in marine atmospheric environments. |
| format | Article |
| id | doaj-art-1534ba3a11d04e699ada4e5105919efd |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1534ba3a11d04e699ada4e5105919efd2025-08-20T01:52:23ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01369403941210.1016/j.jmrt.2025.05.153Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environmentShuai Wu0Cong Liu1Kun Zhou2Ying Li3Zequn Zhang4Bowei Zhang5Junsheng Wu6Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China; Southwest Institute of Technology and Engineering, Chongqing, 400039, ChinaSouthwest Institute of Technology and Engineering, Chongqing, 400039, ChinaSouthwest Institute of Technology and Engineering, Chongqing, 400039, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.The corrosion behavior of 2A12 and 5A02 aluminum alloys in Wenchang marine atmospheric environment was systematically investigated by means of macroscopic morphology observation, microscopic corrosion morphology analysis, pitting analysis, weight loss analysis and electrochemical measurements. Experimental results demonstrated that both alloys exhibited pronounced pitting corrosion, with corrosion products primarily consisting of Al2O3 and AlO(OH). After 48 months of outdoor exposure, 5A02 developed a 25 μm-thick corrosion product layer, while 2A12 displayed a significantly thicker layer (70 μm) accompanied by greater average pitting depth and pit density. Corrosion rates for both alloys followed a similar trend of initially increasing, then decreasing and finally stabilizing, the maximum corrosion rate for 2A12 (32.57 g/m2/a) far exceeded that of 5A02 (2.04 g/m2/a). Electrochemical analysis revealed progressive enhancement of corrosion resistance over time for both alloys, evidenced by increasing polarization resistance (Rp) values. Throughout the exposure period, 5A02 consistently maintained higher Rp values compared to 2A12, conclusively demonstrating its superior corrosion resistance in marine atmospheric environments.http://www.sciencedirect.com/science/article/pii/S22387854250130922A12 aluminum alloy5A02 aluminum alloyCorrosionMarine atmosphere environmentOutdoor exposure |
| spellingShingle | Shuai Wu Cong Liu Kun Zhou Ying Li Zequn Zhang Bowei Zhang Junsheng Wu Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment Journal of Materials Research and Technology 2A12 aluminum alloy 5A02 aluminum alloy Corrosion Marine atmosphere environment Outdoor exposure |
| title | Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment |
| title_full | Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment |
| title_fullStr | Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment |
| title_full_unstemmed | Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment |
| title_short | Corrosion behavior of 2A12 and 5A02 aluminum alloy in typical marine atmosphere environment |
| title_sort | corrosion behavior of 2a12 and 5a02 aluminum alloy in typical marine atmosphere environment |
| topic | 2A12 aluminum alloy 5A02 aluminum alloy Corrosion Marine atmosphere environment Outdoor exposure |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425013092 |
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