Electrochemical Behavior of Fine-Grained Steel in Alkaline Solutions in the Presence of Chlorides
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 7
Abstract
Fine-grained (FG) steel is largely used for high-speed railway applications because of its high yield strength. Its corrosion behavior is equally critical to the service life of reinforced concrete structure, especially in severe environments. The corrosion resistance of FG steel and conventional low-carbon (LC) steel in simulated concrete interstitial electrolytes containing chlorides was investigated by using electrochemical measurements and microstructure characterization techniques. Two types of alkaline solutions, i.e., high-alkaline simulated concrete pore solution (CP solution) and low-alkaline saturated solution (CH solution) were used. The results indicate that, in CP solution with chlorides, FG steel exhibits lower corrosion resistance than LC steel but slightly higher corrosion resistance in CH solution. The corrosion resistance of FG steel appears to be dominated by the amount of corrosion pits in high-alkaline CP solution and by the compactness and adherence of corrosion products in low-alkaline CH solution.
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Acknowledgments
The authors greatly acknowledge the support by the 973 Project (No. 2015CB655100) and the National Natural Science Foundation of China (No. 51678144).
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 7 • July 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 8, 2016
Accepted: Nov 2, 2016
Published ahead of print: Mar 26, 2017
Published online: Mar 27, 2017
Published in print: Jul 1, 2017
Discussion open until: Aug 27, 2017
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