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| Comparative Study on Corrosion Behavior of Aluminum and Aluminum Alloy in Natural Water Environment |
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| DOI：10.7643/issn.1672-9242.2022.05.014 |
| KeyWord:aluminum alloy local corrosion freshwater-seawater alternating aluminum cladding corrosion rate chloride ion electrolyte effect |
| Author | Institution |
| YANG Bo-jun |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China |
| WEI Mu-meng |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China |
| DENG Yu |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China |
| FAN Guo-dong |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China |
| YAO Jing-hua |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China;State Key Laboratory for Marine Corrosion and Protection, Shandong Qingdao , China |
| WANG Jing-jing |
Xiamen Materials Research Institute, No.725 Research Institute, China Shipbuilding Industry Group Co., Ltd., Fujian Xiamen , China;State Key Laboratory for Marine Corrosion and Protection, Shandong Qingdao , China |
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| Abstract: |
| This paper is to study the corrosion behaviors of aluminum and aluminum alloy in natural water environment. Through the 2-year exposure test of LM3 pure aluminum, 5083 aluminum, LF6M unclad aluminum and clad aluminum in natural environments of freshwater-seawater alternating, seawater and freshwater, the corrosion morphology and corrosion rate of the materials in the three environments were compared. The corrosion laws of four kinds of aluminum and aluminum alloy materials in different water environments were summarized, their corrosion mechanisms are briefly discussed, and their long-term corrosion behaviors were predicted. By comparing the synergistic influence factor (b) of local corrosion of four materials, we can find that the fresh water environment has the greatest impact on the local corrosion of LM3 pure aluminum; the fresh seawater environment has the greatest impact on the local corrosion of 5083 aluminum alloy; and both fresh water and fresh seawater environments have a great impact on the local corrosion of the two LF6M aluminum alloy materials. The 5083 aluminum alloy, LF6M unclad aluminum and clad aluminum have the worst corrosion resistance in freshwater-seawater alternating natural environment; and LM3 pure aluminum has the worst corrosion resistance in freshwater. |
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