Passivation and Chloride-Induced Corrosion Behavior of Aluminum Alloys in Pore Solution of Portland Cement Paste
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 11
Abstract
The passivation and chloride-induced corrosion behavior of aluminum alloys (AAs) 2014, 5083, and 6061, as a key component in aluminum alloy–concrete composite, were investigated in a pore solution of portland cement paste via electrochemical methods, scanning electron microscopy (SEM), and Raman spectroscopy. Results show that AA6061 presents the highest corrosion resistance due to the formation of uniform layer on both aluminum matrix and intermetallic phases. AA6061 shows the highest chloride threshold value while exhibiting the lowest corrosion resistance when chloride concentration is above the threshold. Different mechanisms of protection and chloride-induced corrosion for the three aluminum alloys in pore solution are proposed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (51678144) and the National Basic Research Program of China (2015CB655100).
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© 2021 American Society of Civil Engineers.
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Received: Aug 4, 2020
Accepted: Mar 10, 2021
Published online: Aug 25, 2021
Published in print: Nov 1, 2021
Discussion open until: Jan 25, 2022
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