CONCENTRATION MONITORING AND PERFORMANCE OF A MIGRATORY CORROSION INHIBITOR IN STEEL-REINFORCED CONCRETE

Inhibitor concentration depth profiles for concrete samples treated with a proprietary migratory corrosion inhibitor (of the Cortec MCI range) are presented in this paper. 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 in order to achieve inhibition in this case.

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• Corporate Authors:

  Elsevier

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  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Holloway, L
  • Nairn, K
  • Forsyth, M
• Publication Date: 2004-8

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 6 p.
• Serial:
  • Cement and Concrete Research
  • Volume: 34
  • Issue Number: 8
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Ammonium compounds; Chemical properties; Chloride content; Concrete; Corrosion; Depth; Diffusion (Optics); Electrochemical corrosion; Inhibitors (Chemistry); Profilometers
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00983083
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 9 2004 12:00AM