Effect of Corrosion Inhibitors on Concrete Pore Solution Composition and Corrosion Resistance

View/ Open
Issue Date
2013-09Author
O’Reilly, Matthew
Darwin, David
Browning, JoAnn
Xing, Lihua
Locke, Carl E., Jr.
Virmani, Y. Paul
Publisher
American Concrete Institute
Type
Article
Article Version
Scholarly/refereed, publisher version
Published Version
https://iri.ku.edu/papersRights
Copyright © 2013, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion including author’s closure, if any, will be published in the July-August 2014 ACI Materials Journal if the discussion is received by April 1, 2014.
Metadata
Show full item recordAbstract
Three commercially available corrosion inhibitors—calcium nitrite, a solution of amines and esters, and an alkenyl-substituted succinic acid salt—are evaluated in conjunction with conventional reinforcement in concrete based on corrosion rate, metal loss, the critical chloride corrosion threshold (CCCT), pore solution analyses, and concrete compressive strength. All three inhibitors increase time to corrosion initiation and decrease corrosion rate, but are less effective in cracked concrete than in uncracked concrete. Of the three inhibitors, the alkenyl-substituted succinic acid salt results in the greatest decrease in corrosion rate, but exhibits the lowest CCCT—below that measured in concrete with no inhibitor. The compressive strengths of concretes containing the amine-ester inhibitor and the alkenyl substituted succinic acid salt were 15% and 60% lower, respectively, than concrete without an inhibitor. For the latter inhibitor, pore solution analyses indicated elevated sulfate contents at 1 and 7 days, which may explain the low CCCT and strength. Paste containing the amine-ester inhibitor had an elevated sulfate content at 7 days.
Collections
Citation
O'Reilly, M., Darwin, D., Browning, J., Xing, L., Locke Jr., C.E., and Virmani, P., "Effect of Corrosion Inhibitors on Concrete Pore Solution Composition and Corrosion Resistance," ACI Materials Journal, Vol. 110, No. 5, September-October 2013, pp. 577-585.
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.