Performance of a Penetrating Corrosion Inhibitor in Concrete Affected by Carbonation-Induced Corrosion
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 6
Abstract
The performance of an organic, penetrating corrosion inhibitor in reducing the rate of corrosion and delaying the onset of corrosion in carbonated concrete was investigated. Laboratory trials were undertaken on specimens treated with the corrosion inhibitor before and after accelerated carbonation. Corrosion monitoring was undertaken for 11 months measuring corrosion rate, rebar potential, and resistivity. Results indicate that the penetrating corrosion inhibitor is capable of reducing corrosion rates and delaying the onset of corrosion under carbonation conditions. The effectiveness of the inhibitor was also assessed on site structures exhibiting severe carbonation-induced corrosion. Corrosion monitoring on site was done for a period of nine months. Findings from site studies confirmed that surface application of the corrosion inhibitor significantly reduced the corrosion rate of reinforcement embedded in carbonated concrete when compared with untreated elements.
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Acknowledgments
The logistic and financial support from Sika South Africa is gratefully acknowledged, particularly the valuable technical input from Rod van Eck and Paul Adams. In addition, financial support was provided by the South African Cement Industry, the NRF, the THRIP Program of the NRF, and by a grant from the University of Cape Town Research Committee.
References
Alexander, M. G., Mackechnie, J. R., and Ballim, Y. (2001). “Use of durability indexes to achieve durable cover concrete in reinforced concrete structures.” Material science of concrete, J. Skalny and S. Mindess, eds., American Ceramic Society, Westerville, Ohio, 483–511.
ASTM. (1991). “Standard method for half-cell potentials of uncoated reinforcing steel in concrete.” ASTM C876-91, West Conshohocken, Pa.
ASTM. (2002). “Standard test methods for total Kjeldahl nitrogen in water.” ASTM D3590-89, West Conshohocken, Pa.
Batis, G., Pantazopoulou, P., and Routoulas, A. (2003). “Corrosion protection investigation of reinforcement by inorganic coating in the presence of alkanolamine-based inhibitor.” Cem. Concr. Compos., 25(3), 371–377.
Bentur, A., Diamond, S., and Berke, N. S. (1997). Steel corrosion in concrete, E & FN Spon, London.
Broomfield, J. P. (1996). Corrosion of steel in concrete, understanding, investigation, and repair, E & FN Spon, London.
Broomfield, J. P. (1999). “Corrosion inhibitors for steel in concrete.” Concrete, 33(6), 44–47.
Burge, T. A. (1997). “The role of corrosion inhibitors in high performance concrete.” Proc., FIP Symp. of the Concrete Society of Southern Africa, Midrand, South Africa, 550–559.
Fadayomi, J. (1997). “Corrosion inhibitors.” Concrete, 31(8), 21–22.
Feliu, S., Gonzalez, J. A., Feliu, S., Jr., and Andrade, M. C. (1990). “Confinement of the electrical signal for in situ measurements of polarization resistance in reinforced concrete.” ACI Mater. J., 87(5), 457–465.
Heiyantuduwa, R. (2002). “Performance of a penetrating corrosion inhibitor in controlling carbonation-induced corrosion in reinforced concrete.” MSc thesis, Univ. of Cape Town, Rondebosch, South Africa.
ISO. (1989). “Corrosion of metals and alloys, basic terms and definitions.” ISO 8044, Geneva.
Laamenen, P. H., and Byfors, K. (1996). “Corrosion inhibitors in concrete—AMA (alkanolamines)-based inhibitors. State of the art report.” Nord. Concr. Res., 19(2), 29–40.
Mackechnie, J. R., Alexander, M. G., and Rylands, T. (1999). “Laboratory trials with organic corrosion inhibitors.” Proc., 14th Int. Corrosion Congress, Cape Town, Paper 89, Corrosion Institute of Southern Africa, Kelvin, South Africa.
Ngala, V. T., Page, C. L., and Page, M. M. (2003). “Corrosion inhibitor systems for remedial treatment of reinforced concrete. Part 2: Sodium monofluorophosphate.” Corros. Sci., 45(7), 1523–1537.
Parrott, L. J. (1986). “A review of carbonation in reinforced concrete.” Rep., Cement and Concrete Association/Building Research Establishment, Wexham Springs, U.K.
Stahl, E. (1990), Thin-layer chromatography, 2nd Ed., Springer, New York.
Tritthart, J. (2003). “Transport of a surface-applied corrosion inhibitor in cement past and concrete.” Cem. Concr. Res., 33(6), 829–834.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 6 • December 2006
Pages: 842 - 850
Copyright
© 2006 ASCE.
History
Received: Oct 3, 2003
Accepted: Jan 10, 2006
Published online: Dec 1, 2006
Published in print: Dec 2006
Notes
Note. Associate Editor: Zhishen Wu
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