Influences of Electric Potential and Electrolyte on Electrochemical Chloride Removal in Reinforced Concrete
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 1
Abstract
The first purpose of this paper was to find appropriate parameters for the electrochemical chloride removal method; that is, type of electrolyte solution, electric potential and charging duration. The second was to determine the efficiency of the chloride removal at remote areas from the position of installation. The and concrete specimens were prepared for the first and second purposes respectively. The chloride removal process was performed by applying electric potential between the reinforcement bars embedded in concrete and an external electrode installed on the concrete surface submersed in external electrolyte. With 28 days charging, this method could remove up to 76% of chloride by using the solution as electrolyte with 15 V DC electric potential. The efficiency of chloride removal decreased as the distance from the position of installation increased. This was consistent with the equation of Nernst Planck which described the movement of chloride ions mobility through the concrete by electric current. As a result, there was a good tendency for using electrochemical chloride removal method to remove chloride ions from reinforced concrete.
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Acknowledgments
The financial support received from the Kasetsart University Research and Development Institute (KURDI): Research project entitled Study on Electrochemical Chloride Removal in Reinforced Concrete, is greatly appreciated.
References
American Concrete Institute (ACI). (2001). “Protection of metals in concrete against corrosion.”, Farmington Hills, MI.
Arya, C., Sa’id-Shawqi, Q., and Vassie, P. R. W. (1996). “Factors influencing electrochemical removal of chloride from concrete.” Cem. and Concr. Res., 26(6), 851–860.
Bennett, J., Fong, K. F., and Schue, T. J. (1993). “SHRP-S-669: Electrochemical chloride removal and protection of concrete bridge components: Field trials.” Strategic Highway Research Program, National Research Council, Washington, DC.
Fajardo, G., Escadeillas, G., and Arliguie, G. (2006). “Electrochemical chloride extraction (ECE) from steel-reinforced concrete specimens contaminated by “artificial” sea-water.” Corros. Sci., 48(1), 110–125.
Hassanein, A. M., Glass, G. K., and Buenfeld, N. R. (2002). “Protection current distribution in reinforced concrete cathodic protection system.” Cem. Concr. Compos., 24(1), 159–167.
Ihekwaha, N. M., Hope, B. B., and Hasson, C. M. (1996). “Carbonation and electrochemical chloride extraction from concrete.” Cem. Concr. Res., 26(7), 1095–1107.
Japan Society for Civil Engineers (JSCE). (2003). “Test method for effective diffusion coefficient of chloride ion in concrete by migration.”, Tokyo, Japan.
Liu, Y., and Shi, X. (2012). “Ionic transport in cementitious materials under and externally applied electric field: Finite element modeling.” Constr. Build. Mater., 27(1), 450–460.
McGrath, P. F., and Hooton, R. D. (1996). “Influence of voltage on chloride diffusion coefficients from chloride migration tests.” Cem. Concr. Res., 26(8), 1239–1244.
Orellan, J. C., Escadeillas, G., and Arliguie, G. (2004). “Electrochemical chloride extraction: Efficiency and side effects.” Cem. Concr. Res., 34(2), 227–234.
Otsuki, N., Hisada, M., and Amino, T. (1995). “Electric current and ion migration through concrete.” Proc., of Infrastructure Development in Civil Engineering, Kasetsart Univ., Thailand, 21–35.
Pan, T., Nguyen, T. A., and Shi, X. (2008). “Assessment of electrical injection of corrosion inhibitor for corrosion protection of reinforced concrete.”, Transportation Research Board, Washington, DC, 51–60.
Pérez, A., Climent, M. A., and Garcés, P. (2010). “Electrochemical extraction of chlorides from reinforced concrete using a conductive cement paste as anode.” Corros. Sci., 52(5), 1576–1581.
Polder, R. B. (1996). “Electrochemical chloride removal from concrete prisms containing chloride penetrated from sea water.” Constr. Build. Mater., 10(1), 8–88.
Poupard, O., L’Hostis, V., Catinaud, S., and Pertre-Lazar, I. (2006). “Corrosion damage diagnosis of a reinforced concrete beam after 40 years natural exposure in marine environment.” Cem. Concr. Res., 36(3), 504–520.
Sanchez, M., and Alonso, M. C. (2010). “Enhancement of electrochemical chloride removal using corrosion inhibitors.” Proc., 2nd Int. Symp. on Service Life Design for lnfrastructure, RILEM Publications, Delft, Netherlands.
Sanchez, M., and Alonso, M. C. (2011). “Electrochemical chloride removal in reinforced concrete structures: Improvement of effectiveness by simultaneous migration of calcium nitrite.” Constr. Build. Mater., 25(2), 873–878.
Thomas, M. (1996). “Chloride thresholds in marine concrete.” Cem. Concr. Res., 26(4), 513–519.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 1 • January 2014
Pages: 83 - 89
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 30, 2012
Accepted: Jan 9, 2013
Published online: Jan 11, 2013
Discussion open until: Jun 11, 2013
Published in print: Jan 1, 2014
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