Galvanic Current Influencing Interface Deterioration of CFRP Bonded to a Steel Substrate
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 2
Abstract
This paper presents an experimental program investigating the effect of galvanic current on the physical and mechanical characteristics of carbon fiber reinforced polymer (CFRP) composite sheets bonded to a steel substrate. Electrochemical reaction is induced by galvanic interaction between anodes (CFRP-steel interface specimens) and cathodes (metallic strips) linked with an electrolyte (a 3.5% sodium chloride solution). Thirty-five test specimens are exposed to various periods of galvanic current from 0 to 72 h until their corrosion rate is converged. Hydrated ferric oxide forms along the CFRP-steel interface with some concentration in the vicinity of its edge, which accompanies a loss in surface area and mass. The electrochemical reaction imposed by the galvanic current exponentially decays with an increase in exposure time. The initiation of corrosion noticeably affects the load-carrying capacity of the CFRP-steel interface, whereas its propagation is not a critical attribute until substantial corrosion damage takes place. CFRP-debonding is the governing failure mode of the interface, irrespective of the degree of galvanic current exposure. The stress-slip behavior of the interface is influenced by the electrochemical reaction and a geometric discontinuity associated with stress singularity. Corrosion-dependent interfacial fracture energy is probabilistically inferred and used for quantifying the degree of interface deterioration subjected to an aggressive corrosion environment.
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Acknowledgments
The authors would like to thank the Ministry of Higher Education in Libya and the U.S. Department of Transportation through the Mountain-Plains Consortium Program for financial support. The Korea Institute of Civil Engineering and Building Technology provided the third author with a visiting fellowship at the University of Colorado Denver. Proprietary information (e.g., manufacturers) was not included in this paper. The findings presented are based on the opinion of the authors and do not necessarily represent that of others.
References
Ahmad, Z. (2006). Principles of corrosion engineering and corrosion control, Butterworth Heinemann, Oxford, U.K.
Al-Shawaf, A. (2011). “Modelling wet lay-up CFRP-steel failures at extreme temperatures using stress-based approach.” Int. J. Adhes. Adhes., 31(6), 416–428.
ASTM. (2011). “Standard practice for preparing, cleaning, and evaluating corrosion test specimens.” West Conshohocken, PA.
Brosens, K., and van Gemert, D. (1999). “Anchorage design for externally bonded carbon fiber reinforced polymer laminates.” Proc., 4th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures, American Concrete Institute, Farmington Hills, MI, 635–645.
Cadei, J. M., Stratford, T. J., Hollaway, L. C., and Duckett, W. G. (2004). Strengthening metallic structures using externally bonded fibre-reinforced polymers, CIRIA, London.
Dawood, M., and Rizkalla, S. (2010). “Environmental durability of a CFRP system for strengthening steel structures.” Constr. Build. Mater., 24(9), 1682–1689.
Egilmez, O. O., and Yormaz, D. (2011). “Cyclic testing of steel I-beams reinforced with GFRP.” Steel Compos. Struct., 11(2), 93–114.
FHWA. (2014). “National bridge inventory: Bridges by structure type.” Washington, DC.
Gholami, M., Sam, A. R. M., Yatim, J. M., and Tahir, M. M. (2013). “A review on steel/CFRP strengthening systems focusing environmental performance.” Constr. Build. Mater., 47, 301–310.
Hollaway, L. C., and Cadei, J. (2002). “Progress in the technique of upgrading metallic structures with advanced polymer composites.” Progr. Struct. Eng. Mater., 4(2), 131–148.
ISO. (2012). “Corrosion of metals and alloys.” ISO 9224, Geneva.
Liu, T., and Weyers, R. W. (1998). “Modeling the dynamic corrosion process in chloride contaminated concrete structures.” Cem. Concr. Res., 28(3), 365–379.
Mertz, D. R., and Gillespie, J. W. (1996). “Rehabilitation of steel bridge girders through application of advanced composite material.”, Transportation Research Board, Washington, DC.
Nguyen, T. C., Bai, Y., Zhao, X.-L., and Al-Mahaidi, R. (2011). “Mechanical characterization of steel/CFRP double strap joints.” Compos. Struct., 93(6), 1604–1612.
Nguyen, T. C., Bai, Y., Zhao, X.-L., and Al-Mahaidi, R. (2012). “Durability of steel/CFRP double strap joints exposed to sea water, cyclic temperature and humidity.” Compos. Struct., 94(5), 1834–1845.
Shaat, A., and Fam, A. (2008). “Repair of cracked steel girders connected to concrete slabs using carbon-fiber-reinforced polymer sheets.” J. Compos. Constr., 650–659.
Shokrieh, M., and Bayat, A. (2007). “Effects of ultraviolet radiation on mechanical properties of glass/polyester composites.” J. Compos. Mater., 41(20), 2443–2455.
Smith, S. T., and Teng, J. G. (2001). “Interfacial stresses in plated beams.” Eng. Struct., 23(7), 857–871.
Tao, Z., Han, L.-H., and Zhung, J.-P. (2007). “Axial loading behavior of CFRP strengthened concrete-filled steel tubular stub columns.” Adv. Struct. Eng., 10(1), 37–46.
Tavakkolizadeh, M., and Saadatmanesh, H. (2001). “Galvanic corrosion of carbon and steel in aggressive environments.” J. Compos. Constr., 200–210.
Teng, J. G., Yu, T., and Fernando, D. (2012). “Strengthening of steel structures with fiber-reinforced polymer composites.” J. Constr. Steel Res., 78, 131–143.
Vu, K. A. T., and Stewart, M. G. (2000). “Structural reliability of concrete bridges including improved chloride-induced corrosion models.” Struct. Safety, 22(4), 313–333.
Yalcyn, H., and Ergun, M. (1996). “The prediction of corrosion rates of reinforcing steels in concrete.” Cem. Concr. Res., 26(10), 1593–1599.
Zhao, X. L., and Zhang, L. (2007). “State-of-the-art review on FRP strengthened steel structures.” Eng. Struct., 29(8), 1808–1823.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 6, 2015
Accepted: Jun 23, 2015
Published online: Aug 18, 2015
Discussion open until: Jan 18, 2016
Published in print: Feb 1, 2016
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