Corrosion behavior of steel bar embedded in fly ash concrete

Steel bar embedded in concrete without fly ash and with fly ash was tested under complete immersion, in 3.5 wt.% NaCl solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of s...

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Bibliographic Details
Published in:Corrosion science 2006-07, Vol.48 (7), p.1733-1745
Main Authors: Choi, Yoon-Seok, Kim, Jung-Gu, Lee, Kwang-Myong
Format: Article
Language:English
Subjects:
Applied sciences
Chloride ion
Corrosion
Corrosion environments
EIS
Exact sciences and technology
Fly ash
Metals. Metallurgy
Permeability
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Summary:Steel bar embedded in concrete without fly ash and with fly ash was tested under complete immersion, in 3.5 wt.% NaCl solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of steel bar. ASTM C1202 test method was also used to estimate the concrete’s resistance to the penetration of chloride ions. The results obtained from electrochemical tests show that partial replacement of fly ash has led to an enhancement of corrosion resistance and a reduction of corrosion rate due to the decrease of permeability to chloride ions.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2005.05.019