Thyme extract of thymus vulgar L. as volatile corrosion inhibitor for mild steel in NaCl environment
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Thyme extract of thymus vulgar L. as volatile corrosion
inhibitor for mild steel in NaCl environment
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| Creator |
Premkumar, P.
Kannan, K. Natesan, M. |
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| Subject |
Corrosion Science and Engineering
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| Description |
Thyme extract of Thymus vulgar L. plant was used as volatile
corrosion inhibitor for mild steel in sodium chloride environment with
100 % relative humidity. The corrosion rate and inhibition efficiency
of the thyme powder was evaluated by weight loss studies and thyme
impregnated craft paper was evaluated by weight loss and
potentiodynamic polarization studies. It was found that both powder
and impregnated craft paper have significant inhibitive effect. The
inhibition efficiency increases with increase in concentration from 250
to 1000 mg for the powder and 250 to 1000 mg/sq.ft for impregnated
craft paper. This is due to adsorption of inhibitor molecule on the metal
surface. The adsorption behavior of thyme obeys Temkin's adsorption
isotherm. At higher concentration there is decrease in inhibition
efficiency. It may be due to the formation of soluble metal inhibitor
complex in NaCl environment. It has also been found that thyme
powder of concentration 1000 mg and impregnated craft paper of
concentration 1000 mg/sq.ft offered maximum inhibition efficiency of
80.49 and 78.64 %, respectively.
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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/32/1/006-2008.pdf
Premkumar, P. and Kannan, K. and Natesan, M. (2008) Thyme extract of thymus vulgar L. as volatile corrosion inhibitor for mild steel in NaCl environment. Asian Journal of Chemistry, 20 (1). pp. 445-451. |
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| Relation |
http://cecri.csircentral.net/32/
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