Journal
CORROSION SCIENCE
Volume 48, Issue 10, Pages 3243-3260Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2005.11.016
Keywords
steel; corrosion; inhibition; polydentate Schiff base compounds
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The effect of three Schiff base compounds namely, (E)-2-(1-(2-(2-hydroxyethylamino)ethylimino)ethyl)phenol(l), 2,2'-(1E,1'E)-1,1'-(2,2'-azanediylbis(ethane-2,1-diyl)bis(azan-1-yl-1-ylidene)) bis(ethan-1-yi-1-ylidene)diphenol(II) and 2,2'-((2E,12E)-3,6,9,12-tetraazatetradeca-2,12-diene-2,13diyl)diphenol(III) on the corrosion behavior of steel in 2 M HCl solution has been investigated at 298 K by weight loss measurements, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. The inhibition efficiencies obtained from all methods employed are in good agreement. Results show compound III to be the best inhibitor with a mean efficiency of 93% at 10(-2) M additive concentration. Studies showed all three compounds to act as mixed type inhibitors and to obey the Langmuir adsorption isotherm. (c) 2006 Elsevier Ltd. All rights reserved.
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