Corrosion inhibiting properties of some polyaza macrocyclic compounds on mild steel in acid environments
Abstract
Macrocyclic compounds constitute a potential class of corrosion inhibitors. In an attempt to develop effective corrosion inhibitors we have synthesized four macrocyclic compounds by condensing o‐ethylene diamine and o‐phenylene diamine with ethylacetoacetate and succinic acid; Their inhibiting action was evaluated on corrosion of mild steel in HCI and H2SO4 by weight loss and potentiodynamic polarization methods. A macrocyclic compound derived by condensing o‐phenylene diamine with ethylacetoacetate exhibited best performance by giving IE of 98 per cent at 500 ppm concentration. The potentiodynamic polarization studies revealed that the tested compounds are either mixed type or predominantly cathodic inhibitors. IE of all the investigated compounds increased significantly on addition of a small concentration KI in both acids due to synergism.
Keywords
Citation
Ajmal, M., Rawat, J. and Quraishi, M.A. (1998), "Corrosion inhibiting properties of some polyaza macrocyclic compounds on mild steel in acid environments", Anti-Corrosion Methods and Materials, Vol. 45 No. 6, pp. 419-425. https://doi.org/10.1108/00035599810236568
Publisher
:MCB UP Ltd
Copyright © 1998, MCB UP Limited