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Adsorption of benzyldimethyldodecylammonium chloride onto stainless steel using the quartz crystal microbalance and the depletion methods: An optimisation study

Salama, Ibrahim E.; Binks, Bernard P.; Fletcher, Paul D. I.; Horsup, David I.

Authors

Ibrahim E. Salama

Paul D. I. Fletcher

David I. Horsup

Abstract

The adsorption behaviour of benzyldimethyldodecylammonium chloride (C12BDMAC) corrosion inhibitor from aqueous solutions onto a stainless steel surface has been investigated using the quartz crystal microbalance (QCM) technique and the depletion-HPLC method. Three different experimental procedures were used to carry out the adsorption measurements using the QCM. The results revealed that the employed experimental procedure had a marked influence on both of the measured frequency and dissipation energy changes. Additionally, the measured changes in the normalized frequency and dissipation changes were found to be overtone-dependent. The adsorbed amounts determined by QCM were higher than those determined by depletion due to strong contributions from the bulk liquid properties. The direct application of the measured frequency shifts corresponding to the lowest dissipation changes, ΔflowestD, in the Sauerbrey equation was effective in minimising these contributions within an acceptable experimental tolerance. A correction procedure, based on the Kanazawa equation, has been proposed and applied successfully to separate the contribution from the bulk effects to the calculated adsorbed mass. The adsorption isotherms obtained from the corrected frequency shifts and the depletion method were perfectly matched over the whole range of concentrations investigated.

Publication Date Apr 5, 2014
Journal Colloids and surfaces. A, Physicochemical and engineering aspects
Print ISSN 0927-7757
Electronic ISSN 1873-4359
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 447
Pages 155-165
Institution Citation Salama, I. E., Binks, B. P., Fletcher, P. D. I., & Horsup, D. I. (2014). Adsorption of benzyldimethyldodecylammonium chloride onto stainless steel using the quartz crystal microbalance and the depletion methods: An optimisation study. Colloids and surfaces. A, Physicochemical and engineering aspects, 447, 155-165. https://doi.org/10.1016/j.colsurfa.2014.01.034
DOI https://doi.org/10.1016/j.colsurfa.2014.01.034
Keywords Corrosion inhibition; Adsorption; Quartz crystal microbalance; Quaternary ammonium salts; Depletion
Publisher URL http://www.sciencedirect.com/science/article/pii/S0927775714000739
Copyright Statement ©2015 University of Hull
Additional Information Author's accepted manuscript of article first published in Colloids and surfaces. A, Physicochemical and engineering aspects, 2014, v.447

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