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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(6) [November 2010] >
| Title: | Inhibition of mild steel corrosion in 1 M hydrochloric acid using (E)-4-(2-chlorobenzylideneamino)-6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (CBMTDT) |
| Authors: | Joseph, Bincy
John, Sam
Aravindakshan, K K
Joseph, Abraham |
| Keywords: | Corrosion
Mild steel
Electrochemical impedence
Potentiodynamic polarization
CBMTDT |
| Issue Date: | Nov-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The use of nitrogen and
sulphur donor organic inhibitors in acid solutions is a common method for the
protection of metals from corrosion. The present work is the study of the
corrosion inhibition efficiency of
(E)-4-(2-chlorobenzylideneamino)-6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one
(CBMTDT) towards mild steel in 1 M HCl. The work strategy includes the
conventional weight loss method, potentiodynamic polarization studies (Tafel),
linear polarization studies (LPR), electrochemical impedance spectroscopy
(EIS), adsorption studies and quantum chemical calculations. Results showed
that the corrosion rate decreases and inhibition efficiency increases with
inhibitor concentration. The results of polarization studies reveal that the
additive acts as a mixed type inhibitor. The surface adsorption of the
inhibitor molecules decreases the double layer capacitance and increases the
polarization resistance. The adsorption process is spontaneous and follows
Langmuir adsorption isotherm model. The optimized structure of the inhibitor,
energies of LUMO, HOMO and other physical parameters are calculated by
computational quantum chemical methods. |
| Page(s): | 425-430 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(6) [November 2010]
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