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Inhibition of the corrosion of carbon steel in hydrochloric acid solution by bisquaternary ammonium salt

Wang Huilong (Chemistry Department, Huazhong University of science and Technology, Wuhan 430074, People's Republic of China)
Zheng Jiashen (Chemistry Department, Huazhong University of science and Technology, Wuhan 430074, People's Republic of China)
Liu Jing (Chemistry Department, Huazhong University of science and Technology, Wuhan 430074, People's Republic of China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 April 2002

576

Abstract

The effectiveness of bisquaternary ammonium salt N,N′‐Bis(dodecyldimethyl)‐3‐oxa‐1,5‐ pentanediammonium dichloride used as corrosion inhibitor for carbon steel in 1.0 M HCl was investigated by weight loss and electrochemical techniques. Surfaces were characterised by scanning electron microscopy. The performance of the bisquaternary ammonium salt was also compared with that of urotropine, a commercial corrosion inhibitor for acid media in industry practice. The results showed good inhibiting action of the inhibitor. The inhibition efficiency increases with the inhibitor concentration but is temperature–independent. N,N′‐Bis(dodecyldimethyl)‐3‐oxa‐1,5‐pentanediammonium dichloride acts mainly as a mixed‐type inhibitor. The inhibition of this bisquaternary ammonium compound was assumed to occur via adsorption of the inhibitor molecule on the metal surface without affecting the corrosion mechanisms. The adsorption of the inhibitor on the metal surface in HCl solution was found to obey Frumkin's isotherm.

Keywords

Citation

Huilong, W., Jiashen, Z. and Jing, L. (2002), "Inhibition of the corrosion of carbon steel in hydrochloric acid solution by bisquaternary ammonium salt", Anti-Corrosion Methods and Materials, Vol. 49 No. 2, pp. 127-132. https://doi.org/10.1108/00035590210419371

Publisher

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MCB UP Ltd

Copyright © 2002, MCB UP Limited

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