Determination of migration efficiency of amino alcohol based migrating corrosion inhibitor through concrete
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Determination of migration efficiency of amino
alcohol based migrating corrosion inhibitor through concrete
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| Creator |
Vedalakshmi, R.
Rajagopalan, K. Palaniswamy, N. |
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| Subject |
Corrosion Science and Engineering
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| Description |
The migration efficiency of an amino alcohol based migrating corrosion inhibitor (MCI) through
hardened concrete of two different strengths (20 and 30 MPa) with two different thicknesses (25
and 40 mm) has been studied using diffusion test cell arrangement. The corrosion current Icorr
was measured using Tafel extrapolation technique. There is a 20 times reduction in Icorr of steel in
presence of MCI compared to that of bare steel. The migration efficiency decreases with an
increase in thickness as well as strength of concrete. The density of concrete influences the
diffusion rate of MCI. The diffusion rate is two times higher in 20 MPa concrete than that of 30 MPa
concrete. The studies have indicated that the passive layer formed on the rebar surface is not
stable in presence of 1% of chloride in 20 MPa concrete. Because of higher chloride threshold
level the MCI has performed better in 30 MPa concrete. The results conclude that if higher
protection efficiency is needed where structure is exposed to high chloride environments, it is
more appropriate that the MCI shall be added at the rate of 2?45 kg m23 along with concrete/
repair mortar than applied on the concrete surface.
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| Date |
2009
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/306/1/031-2009.pdf
Vedalakshmi, R. and Rajagopalan, K. and Palaniswamy, N. (2009) Determination of migration efficiency of amino alcohol based migrating corrosion inhibitor through concrete. Corrosion Engineering, Science and Technology, 44 (1). pp. 20-31. |
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| Relation |
http://cecri.csircentral.net/306/
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