Quantitative Study on MCI Rehabilitating Steel Bars in Chloride-Contaminated Concrete Based on Inhibition and Transport Behaviors
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 12
Abstract
The transport and inhibition behaviors of a migrating corrosion inhibitor (MCI, marked PCI-2015) in reinforced concrete (in this paper, only mortar specimens were used for testing) contained different contents of NaCl (0.25, 0.5, 0.75, and 1% by weight of cement) with three water-cement ratios (0.45, 0.55, and 0.65) were investigated by using absorption tests and electrochemical measurements. The results indicated that the measured absorption weight of PCI-2015 basically agrees with the numerical value calculated by the modified MCI transport model, and the representative absorbed weight of PCI-2015 in W/C 0.65 concrete with 1% NaCl was at 1 day, while the corrosion current () of steel bars in the concrete was reduced to from the initial data . The visual observation of surface condition for steel bars in concrete mixed with 1% NaCl by broken specimens showed that the surfaces of steel bars in concrete treated with PCI-2015 were bright. X-ray photoelectron spectroscopy (XPS) analysis of steel bar removed from concrete specimens demonstrated the chloride ion on the steel surface was replaced by atoms or molecules of the inhibitor. By using multivariate nonlinear regression analysis, the relationship among the corrosion current density () of steel bar in concrete, water-soluble chloride contents (), and the calculated mass concentration of PCI-2015 at steel-concrete interfacial zone () were established. So a quantitative assessment method for MCI repairing steel bars in chloride contaminated concrete based on MCI inhibition and transport performance was suggested.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors are thankful for financial support from National Natural Science Foundation of China (51278443), Shandong Province Natural Science Foundation (ZR2011EEM006), and Graduate Innovation Fund of Yantai University (01075).
References
Atmani, F., Lahem, D., Poelman, M., Buess-Herman, C., and Olivier, M. G. (2013). “Mild steel corrosion in chloride environment: Effect of surface preparation and influence of inorganic inhibitors.” Corros. Eng. Sci. Technol., 48(1), 9–18.
Bjegovic, D., and Miksic, B. (1999). “Migrating corrosion inhibitor protection of concrete.” Mater. Perform., 38(11), 52–56.
Broomfield, J. P. (2007). Corrosion of steel in concrete, understanding, investigation and repair, 2nd Ed., Taylor and Francis Group, London.
Elsener, B., BüChler, M., Stalder, F., and BöHni, H. (1999). “Migrating corrosion inhibitor blend for reinforced concrete. Part 1: Prevention of corrosion.” Corrosion, 55(12), 1155–1163.
Etteyeb, N., Dhouibi, L., Takenouti, H., Alonso, M. C. and Triki, E. (2007). “Corrosion inhibition of carbon steel in alkaline chloride media by .” Electrochim. Acta, 52(27), 7506–7512.
Holloway, L., Nairn, K., and Forsyth, M. (2004). “Concentration monitoring and performance of a migratory corrosion inhibitor in steel-reinforced concrete.” Cem. Concr. Res., 34(8), 1435–1440.
Liu, Z. Y., Miao, C., Zhou, W., and Liu, J. (2008). “Maintenance and improvement of durability of reinforced concrete using migrating corrosion inhibitors.” J. Chin. Ceram. Soc., 36(10), 1494–1500 (in Chinese).
Liu, Z. Y., Yu, L, Wang, Z. X., and Yang, W. B. (2016). “Modeling and experimental validation of MCI transport involving pore-blocking effect in cement-based materials.” J. Mater. Civ. Eng., 04015187.
Liu, Z. Y., Yu, L., and Li, Q. Z. (2015). “Synergic mechanism of an organic corrosion inhibitor for preventing carbon steel corrosion in chloride solution.” J. Wuhan Univ. Technol. Mater. Sci. Eng., 30(2), 325–330.
Ministry of Housing and Urban-Rural Development in the People’s Republic of China. (2009). “Chinese standard for test method of basic properties of construction mortar.”, Beijing.
Ministry of Water Resources of the People’s Republic of China. (2006). “Test code for hydraulic concrete.”, Beijing.
Ormellese, M., Lazzari, L., Goidanich, S., Fumagalli, G., and Brenna, A. (2009). “A study of organic substances as inhibitors for chloride-induced corrosion in concrete.” Corros. Sci., 51(12), 2959–2968.
Page, M. M., Ngala, V. T., and Page, C. L. (2000). “Corrosion inhibitors in concrete repair systems.” Mag. Concr. Res., 52(1), 25–37.
Poursaee, A. (2010). “Potentiostatic transient technique, a simple approach to estimate the corrosion current density and stern-geary constant of reinforcing steel in concrete.” Cem. Concr. Res., 40(9), 1451–1458.
Yu, L., Liu, Z. Y., Yang, W. B., and Wang, Z. X. (2016). “Adsorption and characterization of an organic corrosion inhibitor for inhibiting carbon steel corrosion in chloride solution.” Curr. Anal. Chem., 12(2), 141–146.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 11, 2015
Accepted: May 25, 2016
Published online: Jul 20, 2016
Published in print: Dec 1, 2016
Discussion open until: Dec 20, 2016
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.