Application of harmonic analysis in measuring the corrosion rate of rebar in concrete
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Application of harmonic analysis in measuring the corrosion rate of rebar in concrete
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| Creator |
Vedalakshmi, R.
Manoharan, SP. Song, HW. |
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| Subject |
Corrosion Science and Engineering
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| Description |
The corrosion rate (CR) of rebar embedded in cement mortar, concrete and cement extract is determined
using harmonic analysis technique (HA). Simultaneously using other electrochemical techniques such as
impedance spectroscopy (EIS) and Tafel extrapolation (TET), the CR was determined and compared with
the weight loss method. CR obtained from HA is comparable to that of EIS provided that the Stern–Geary
constant (B value) obtained from HA is used in the calculation. In concrete, comparable corrosion rates
are obtained between TET and HA only under active condition of the rebar whereas under passive state,
the corrosion current (icorr) by TET is 10 times lower than that of HA. A good agreement is obtained
between the HA and weight loss method. The outcome of the result suggests that HA is capable of providing
a higher degree of accuracy than that of EIS and TET in the determination of icorr in the medium like
rebar in concrete having very low rate of corrosion.
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| Publisher |
Elsevier
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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/310/1/032-2009.pdf
Vedalakshmi, R. and Manoharan, SP. and Song, HW. (2009) Application of harmonic analysis in measuring the corrosion rate of rebar in concrete. Corrosion Science, 51 (11). pp. 2777-2789. ISSN 0010-938X |
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| Relation |
http://cecri.csircentral.net/310/
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