The application of some polydentate Schiff base compounds containing aminic nitrogens as corrosion inhibitors for mild steel in acidic media

The effect of three Schiff base compounds namely, ( E)-2-(1-(2-(2-hydroxyethylamino)ethylimino)ethyl)phenol(I), 2,2′-(1 E,1′ E)-1,1′-(2,2′-azanediylbis(ethane-2,1-diyl)bis(azan-1-yl-1-ylidene))bis(ethan-1-yl-1-ylidene)diphenol(II) and 2,2′-((2 E,12 E)-3,6,9,12-tetraazatetradeca-2,12-diene-2,13-diyl)...

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Bibliographic Details
Published in:Corrosion science 2006-10, Vol.48 (10), p.3243-3260
Main Authors: Emregül, Kaan C., Düzgün, Ece, Atakol, Orhan
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion environments
Corrosion prevention
Exact sciences and technology
Inhibition
Metals. Metallurgy
Polydentate Schiff base compounds
Steel
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Summary:The effect of three Schiff base compounds namely, ( E)-2-(1-(2-(2-hydroxyethylamino)ethylimino)ethyl)phenol(I), 2,2′-(1 E,1′ E)-1,1′-(2,2′-azanediylbis(ethane-2,1-diyl)bis(azan-1-yl-1-ylidene))bis(ethan-1-yl-1-ylidene)diphenol(II) and 2,2′-((2 E,12 E)-3,6,9,12-tetraazatetradeca-2,12-diene-2,13-diyl)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.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2005.11.016