Electrochemical Study on Inhibitors of Rebar Corrosion in Carbonated Concrete

This paper presents a study in which electrochemical impedance spectroscopy (EIS) was used to examine the inhibitive action of some organic compounds towards the corrosion of carbon steel. The study examined the reactions in a solution that simulates the pore chemistry of carbonate concrete and in the carbonated concrete itself. The synthetic solution was made by bubbling pure CO2 in a saturated Ca(OH)2 solution until it achieved pH 7, then filtering it. Concrete carbonation was obtained by keeping concrete specimens in a pure CO2 atmosphere for 80 days at 68% relative humidity and room temperature. In the synthetic solution benzoate, its amino-derivatives and dicarboxylates formed a long-lasting layer on the steel surface. Their efficiency improved with time. In the carbonated concrete the additives causing a decrease in the concrete compressive strength were discarded. Samples were monitored for up to 400 days but only two samples showed inhibition of the rebar corrosion process.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Trabanelli, G
  • Monticelli, C
  • Grassi, V
  • Frignani, A
• Publication Date: 2005-9

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1804-1813
• Serial:
  • Cement and Concrete Research
  • Volume: 35
  • Issue Number: 9
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Carbonation; Concrete; Corrosion; Electrochemistry; Reinforced concrete; Reinforcing bars; Reinforcing steel
• Uncontrolled Terms: Electrochemical impedance spectroscopy
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01007076
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 3 2005 1:21PM