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Synergistic inhibition of anionic and nonionic surfactants on corrosion of mild steel in acidic solution

Synergistic inhibition of anionic and nonionic surfactants on corrosion of mild steel in acidic... Sodium oleic sulfonate (SOS), polyoxyethylene (20) sorbitan monooleate (Tween 80 or T 80 ) and their mixtures have been studied as acid corrosion inhibitors for mild steel in 1M HCl using adsorption and gravimetric techniques. All the data reveal that the compounds act as inhibitors in the acid environment. The adsorption and inhibition efficiency are discussed as a function of the concentration and the nature of mixing the two surfactants. T 80 + ॅ SOS mixtures show a better inhibition effect than SOS + ॅ T80 , that increases with the value of ॅ SOS . The interaction and synergism of the investigated mixtures are studied by calculating the interaction parameters (ॆ) and the degree of synergism (S) from surface tension‐concentration and corrosion data. The degree of synergism for T 80 + ॅ SOS is higher than that of SOS + ॅ T80 . This is believed to be due to the presence of the small amount of the co‐surfactant SOS which serves as an anchor molecule for the nonionic molecules. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

Synergistic inhibition of anionic and nonionic surfactants on corrosion of mild steel in acidic solution

M.N. Shalaby; M.M. Osman
Anti-Corrosion Methods and Materials , Volume 48 (5): 10 – Oct 1, 2001
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References (28)

Publisher
Emerald Publishing
Copyright
Copyright © 2001 MCB UP Ltd. All rights reserved.
ISSN
0003-5599
DOI
10.1108/EUM0000000005885
Publisher site
See Article on Publisher Site

Abstract

Sodium oleic sulfonate (SOS), polyoxyethylene (20) sorbitan monooleate (Tween 80 or T 80 ) and their mixtures have been studied as acid corrosion inhibitors for mild steel in 1M HCl using adsorption and gravimetric techniques. All the data reveal that the compounds act as inhibitors in the acid environment. The adsorption and inhibition efficiency are discussed as a function of the concentration and the nature of mixing the two surfactants. T 80 + ॅ SOS mixtures show a better inhibition effect than SOS + ॅ T80 , that increases with the value of ॅ SOS . The interaction and synergism of the investigated mixtures are studied by calculating the interaction parameters (ॆ) and the degree of synergism (S) from surface tension‐concentration and corrosion data. The degree of synergism for T 80 + ॅ SOS is higher than that of SOS + ॅ T80 . This is believed to be due to the presence of the small amount of the co‐surfactant SOS which serves as an anchor molecule for the nonionic molecules.

Journal

Anti-Corrosion Methods and Materials – Emerald Publishing

Published: Oct 1, 2001

Keywords: Corrosion inhibitors; Mild steel; Surfactants

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