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

被引：11

作者：

Salama, Ibrahim E. ^{[1
]}

Binks, Bernard P. ^{[1
]}

Fletcher, Paul D. I. ^{[1
]}

Horsup, David I. ^{[2
]}

机构：

[1] Univ Hull, Dept Chem, Surfactant & Colloid Grp, Kingston Upon Hull HU6 7RX, N Humberside, England

[2] Nalco, Sugar Land, TX 77478 USA

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2014年 / 447卷

关键词：

Corrosion inhibition; Adsorption; Quartz crystal microbalance; Quaternary ammonium salts; Depletion; SURFACE-PLASMON RESONANCE; QCM-D; BIOMOLECULAR ADSORPTION; VISCOELASTIC PROPERTIES; SOLID-SURFACES; POLYMER-FILMS; CARBON-STEEL; CORROSION; FREQUENCY; INTERFACES;

D O I：

10.1016/j.colsurfa.2014.01.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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, Delta f (lowestD) 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. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：155 / 165

页数：11

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