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Concentration monitoring and performance of a migratory corrosion inhibitor in steel-reinforced concrete

journal contribution
posted on 01.01.2004, 00:00 authored by L Holloway, K Nairn, Maria ForsythMaria Forsyth
Inhibitor concentration depth profiles for concrete samples treated with a proprietary migratory corrosion inhibitor (of the Cortec MCI range) are presented. The treated concrete was cored and these cores were then sectioned and crushed before being immersed in distilled water to extract the available inhibitor. The amine concentrations were quantified using an ammonium-sensing electrode and were then related to the inhibitor concentration present. The inhibitor examined, reported to contain a combination of volatile amines and amino carboxylate compounds, was found to readily diffuse through concrete. The inhibitor was subjected to a 5-year trial and found to be effective in suppressing corrosion of steel reinforcement in the presence of high chloride concentrations. The concentration profiles indicate that only relatively low concentrations of inhibitor were required to achieve inhibition in this case.

History

Journal

Cement and Concrete Research

Volume

34

Issue

8

Pagination

1435 - 1440

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0008-8846

eISSN

1873-3948

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2004, Elsevier Ltd.