Surface and thermodynamic parameters of some cationic corrosion inhibitors
- 1 December 1997
- journal article
- Published by Emerald in Anti-Corrosion Methods and Materials
- Vol. 44 (6), 389-392
- https://doi.org/10.1108/00035599710185449
Abstract
Four cationic corrosion inhibitors were prepared having the general formula ClRN+H2(CH2)nN+H2RCl, where R is a hydrogen atom or benzyl group, n = 8 or 10. Determines the critical micelle concentration (CMC) at 38, 48 and 58°C. Also investigates structural effects on the CMC, maximum surface excess (Γmax), and minimum area per molecule (Amin) at the aqueous solutions/air interface. Shows that these inhibitors provided a powerful corrosion inhibition of steel in sulphuric acid solution at temperatures up to 78°C. Also indicates that the alkylation process improved surface and thermodynamic properties, consequently attaining better inhibition effects.Keywords
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