NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(3) [May 2011] >

Title: Inhibition efficiency of two bipyrazole derivatives on steel corrosion in hydrochloric acid media
Authors: Tebbji, K
Aouniti, A
Attayibat, A
Hammouti, B
Oudda, H
Benkaddour, M
Radi, S
Nahle, A
Keywords: Pyrazole
Hydrochloric acid
Corrosion inhibition
Issue Date: May-2011
Publisher: NISCAIR-CSIR, India
Abstract: The inhibitor effect of two isomers namely 2-(1',5,5'-trimethyl-1H,1'H-3,3'-bipyrazol-1-yl)ethanol (1-TBE) and 2-(1',5,5'-trimethyl-1H,2'H-3,3'-bipyrazol-2-yl)ethanol (2-TBE) on the corrosion of mild steel in 1.0 M hydrochloric acid has been investigated at 308 K using weight loss measurements and electrochemical techniques (impedance spectroscopy and polarisation curves). Inhibition efficiency is dependent upon the pyrazole structure, with 1-TBE serving as a better inhibitor than 2-TBE and its inhibition efficiency increases with the increase of concentration of inhibitor to attain 93% in the presence of 10-3M. Polarisation curves indicate that 1-TBE and 2-TBE act essentially as cathodic inhibitors. Efficiency (E) percent values obtained by various methods are reasonably good in agreement. EIS measurements show an increase of the transfer resistance with the inhibitor concentration. The temperature effect on the corrosion behaviour of steel in 1.0 M HCl without and with the inhibitor at 10-3M is studied in the temperature range 308-333 K, Some thermodynamic parameters such as adsorption heat (H°), adsorption entropy (S°) and adsorption free energy (G°) have been calculated by employing thermodynamic equations. Kinetic parameters such as apparent activation energy and pre-exponential factor have also been calculated. Adsorption of 1-TBE on the mild steel surface in 1.0 M HCl follows the Langmuir isotherm model.
Page(s): 244-253
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.18(3) [May 2011]

Files in This Item:

File Description SizeFormat
IJCT 18(3) 244-253.pdf231.39 kBAdobe PDFView/Open
 Current Page Visits: 187 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 163445 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: