Title:
Halting Corrosion by Chloride Extraction and Realkalization
Author(s):
Emmanuel E. Velivasakis, Sten K. Henriksen and David Whitmore
Publication:
Concrete International
Volume:
19
Issue:
12
Appears on pages(s):
39-45
Keywords:
alkali content; chlorides; contaminated concrete; corrosion;
inspection; reinforcing steels;
DOI:
Date:
12/1/1997
Abstract:
Chloride extraction and realkalization are nondestructive electrochemical treatments to halt and prevent corrosion in chloride contaminated and carbonated concrete, respectively. The process removes chloride ions from the contaminated concrete by the principle of ion migration while at the same time raising the pH of the carbonated concrete through electro-osmosis. These processes have been tested extensively in the laboratory and field trials and found to be very effective in a wide range of applications.