Synergism and antagonism in mild steel corrosion inhibition by sodium dodecylbenzenesulphonate and hexamethylenetetramine

Hosseini, M. and Mertens, S.F.L. and Arshadi, M.R. (2003) Synergism and antagonism in mild steel corrosion inhibition by sodium dodecylbenzenesulphonate and hexamethylenetetramine. Corrosion Science, 45 (7). pp. 1473-1489. ISSN 0010-938X

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Abstract

The inhibition effects of sodium dodecylbenzenesulphonate (SDBS) and hexamethylenetetramine (HA) on the corrosion of mild steel in sulphuric acid solution have been studied using weight loss, electrochemical impedance and Tafel polarisation measurements. For HA, a monotonous increase in inhibition efficiency is observed as a function of concentration. For SDBS, however, an optimum in the inhibition efficiency is observed for a concentration close to 250 ppm, which is ascribed to the formation of hemi-micellar aggregates that provoke inhibitor desorption from the metal/solution interface at higher concentrations. Upon mixing HA and SDBS, concentration regions showing synergistic and antagonistic inhibition behaviour are identified, and it is concluded that electrostatic interactions between adsorbate ions are likely responsible for both phenomena. Langmuir and Frumkin isotherms were tested for relevance in describing the adsorption behaviour of both HA and SDBS. © 2003 Published by Elsevier Science Ltd.

Item Type: Journal Article
Journal or Publication Title: Corrosion Science
Subjects:
ID Code: 133006
Deposited By: ep_importer_pure
Deposited On: 22 Apr 2019 10:55
Refereed?: Yes
Published?: Published
Last Modified: 22 Jun 2019 09:08
URI: https://eprints.lancs.ac.uk/id/eprint/133006

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