Cathodic protection of steel in concrete using magnesium alloy anode
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Cathodic protection of steel in concrete using magnesium alloy anode
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| Creator |
Parthiban, G.T.
Thirumalai, P. Ravi, R. Saraswathy, V. Palaniswamy, N. Sivan, V. |
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| Subject |
Corrosion Protection
Corrosion Science and Engineering |
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| Description |
Corrosion of steel embedded in concrete structures and bridges is prevented using cathodic protection.
Majority of the structures protected employ impressed current system. Use of sacrificial system for the
protection of steel in concrete is not as widely employed. The use of magnesium anodes for the above
purpose is very limited. This study has been carried out with a view to analyse the use of magnesium
alloy anode for the cathodic protection of steel embedded in concrete.
Magnesium alloy anode, designed for three years life, was installed at the center of reinforced concrete
slab, containing 3.5% sodium chloride with respect to weight of cement, for cathodic protection. Potential
of the embedded steel and the current flowing between the anode and the steel were monitored, plotted
and analyzed. Chloride concentration of concrete at different locations, for different timings, were also
determined and analyzed.
The magnesium anode was found to shift the potential of the steel to more negative potentials initially,
at all distances and later towards less negative potentials. The chloride concentration was found to
decrease at all the locations with increase in time. The mechanism of cathodic protection with the sacrificial
anode could be correlated to the removal of corrosive ions such as chloride from the vicinity of steel.
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| Publisher |
Elsevier Ltd.
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/55/1/021-2008.pdf
Parthiban, G.T. and Thirumalai, P. and Ravi, R. and Saraswathy, V. and Palaniswamy, N. and Sivan, V. (2008) Cathodic protection of steel in concrete using magnesium alloy anode. Corrosion Science, 50 (12). pp. 3329-3335. |
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| Relation |
http://cecri.csircentral.net/55/
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