Investigations of Sulfuric Acid Corrosion of Concrete. II: Electrochemical and Visual Observations
Publication: Journal of Environmental Engineering
Volume 127, Issue 7
Abstract
Degradation of a mortar specimen exposed to an acidic sulfate solution was studied using iron pins set within the sample with their ends close to the surface. Electrochemical impedance spectroscopy and the open circuit potential of the pins were used to monitor corrosion behavior. An experiment in which the pH of the test solution was maintained in the range of 4–5 for 8 days and 2–3 for 73 days was performed. The experimental data were used to investigate the efficacy of a diffusion-reaction based model with a moving boundary for the corrosion process. The open circuit potential of the pins indicated initiation of active corrosion of the pins closest to the surface of the mortar after 36 days in the second experiment. Visual observation of the cross section of the mortar sample at the end of the experiment indicated that 0.82 mm of the mortar was corroded. The data established the validity of the moving boundary paradigm for sulfide corrosion of concrete. Electrochemical impedance spectroscopy and open circuit potential were found to be valuable tools for monitoring corrosion of the iron pins in the specimen.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
American Public Works Association (APWA). ( 1988). Standard specifications for public works construction, Building News, Needham, Mass., 108–109.
2.
Bohm, M., Devinny, J. S., Jahani, F., Mansfeld, F., Rosen, I. G., and Wang, C. ( 1999). “A moving boundary diffusion model for the corrosion of concrete wastewater systems: Simulation and experimental validation.” Proc., Am. Control Conf., American Automatic Control Council, Evanston, Ill., 1739–1743.
3.
Bohm, M., Devinny, J. S., Jahani, F., and Rosen, I. G. ( 1998). “On a moving-boundary system modeling corrosion in sewer pipes.” Appl. Math. Comp., 92, 247–269.
4.
Jahani, F., Devinny, J., Mansfeld, F., Rosen, G., Sun, Z., and Wang, C. (2001). “Investigations of sulfuric acid corrosion of concrete. I: Modeling and chemical observations.”J. Envir. Engrg., ASCE, 127(7), 572–579.
5.
Mansfeld, F. ( 1976). “The polarization resistance technique for measuring corrosion currents.” Advances in corrosion science and technology, Vol. 6, Plenum, New York, 163–262.
6.
Mansfeld, F. ( 1995). “The use of electrochemical impedance spectroscopy (EIS) for the study of corrosion protection by polymer coatings—A review.” J. Appl. Electrochemistry, 25, 187–202.
7.
Mansfeld, F., and Lorenz, W. J. ( 1991). “Electrochemical impedance spectroscopy (EIS)—Applications in corrosion science and technology.” Techniques for characterization of electrodes and electrochemical processes, R. Varma and J. R. Selman, eds., Wiley, New York, 581–647.
8.
Mansfeld, F., and Tsai, C. H. ( 1992a). “Determination of coating delamination with EIS. I. Basic relationships.” Corrosion, 47, 958–963.
9.
Mansfeld, F., Tsai, C. H., and Shih, H. ( 1992b). “Software for simulation and analysis of electrochemical impedance spectroscopy (EIS) data.” Spec. Tech. Publ. 1154, ASTM, West Conshohocken, Pa., 186–196.
10.
Mehta, P. K. ( 1986). Concrete structure, properties, and materials, Prentice-Hall, Englewood Cliffs, N.J.
11.
Uhlig, H. H., and Revie, R. W. ( 1985). Corrosion and corrosion control, 3rd Ed., Wiley, New York.
12.
Verges-Belmin, V. ( 1994). “Pseudomorphism of gypsum after calcite, a new textural feature accounting for the marble sulphation mechanism.” Atmospheric Envir., 28(2), 295–304.
Information & Authors
Information
Published In
History
Received: Feb 22, 2001
Published online: Jul 1, 2001
Published in print: Jul 2001
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.