Corrosion Behavior of 5083 Aluminum Alloy under Freshwater-Seawater Alternate Circumstance
Received:October 09, 2016  Revised:February 15, 2017
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DOI:10.7643/ issn.1672-9242.2017.02.008
KeyWord:5083 aluminum alloy  freshwater-seawater alternation  electrochemistry  corrosion
              
AuthorInstitution
CHEN Xiang-feng 1.State Key Laboratory for Marine Corrosion and Protection, Xiamen , China;2.Luoyang Ship Material Research Institute, Xiamen , China
YANG Bo-jun Luoyang Ship Material Research Institute, Xiamen , China
WU Bo 1.State Key Laboratory for Marine Corrosion and Protection, Xiamen , China;2.Luoyang Ship Material Research Institute, Xiamen , China
YAO Jing-hua 1.State Key Laboratory for Marine Corrosion and Protection, Xiamen , China;2.Luoyang Ship Material Research Institute, Xiamen , China
REN Run-tao 1.State Key Laboratory for Marine Corrosion and Protection, Xiamen , China;2.Luoyang Ship Material Research Institute, Xiamen , China
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Abstract:
      Objective To study the corrosion resisting property of 5083 aluminum in freshwater and seawater alternate circumstance. Methods The 5083 aluminum alloy was tested in freshwater, seawater and freshwater-seawater alternate circumstances according to GB/T 5776. The corrosion data of test specimen in each period were collected to compare the corrosion resisting property of 5083 aluminum in three different natural water circumstances. Results 5083 aluminum suffered from serious corrosions in freshwater and seawater alternate circumstance. Its corrosion rate was 5.3 times of that in seawater and 15.8 times of that in freshwater. Its depth of pitting was 2.6 times of that in seawater and 1.7 times of that in freshwater. Conclusion The corrosion resistance of 5083 aluminum is poor in freshwater-seawater alternate circumstance. It is well verified by the result of the electrochemical test.
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