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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(5) [September 2010] >
| Title: | Imidazolidine-2-thione as corrosion inhibitor for mild steel in hydrochloric acid |
| Authors: | Joseph, Bincy
John, Sam
Joseph, Abraham
Narayana, B |
| Keywords: | Corrosion inhibition
Imidazolidine-2-thione
Mild steel
Potentiodynamic polarization |
| Issue Date: | Sep-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The inhibition
effect of imidazolidine-2-thione (IMT) on the corrosion behaviour of mild steel
(MS) in 1 N HCl was studied using potentiodynamic polarization, linear polarisation
resistance (LPR), electrochemical impedance spectroscopy (EIS) and adsorption
studies. The effects of inhibitor concentrations, temperature, corrosion rate
and surface coverage are investigated. The corrosion rate and other parameters
are evaluated for different inhibitor concentrations and the probable mechanism
is also proposed. The results show that IMT possesses excellent inhibiting
effect for the corrosion of the MS and the inhibitor acts as a mixed type
inhibitor. The inhibitor does not affects the mechanism of the electrode
processes and inhibits corrosion by blocking the reaction sites. The high
inhibition efficiency of IMT was due to the adsorption of inhibitor molecules
on the metal surface. The decrease of surface area available for electrode
reactions to take place is due to the formation of a protective film.
Activation energies and enthalpies of activation in the presence and absence of
IMT were determined by measuring the temperature dependence of the corrosion
current. |
| Page(s): | 366-374 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(5) [September 2010]
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