Materials and Corrosion · 2003 · 37 citations · 6 references
Natural SciencesChemical EngineeringChemistryCorrosion ScienceGreen ChemistrySurface ScienceCorrosion ControlCorrosion InhibitorsCorrosion KineticsCorrosion MechanismsCorrosion ResistanceCorrosion-resistant MaterialsAdsorption IsothermsAdsorption PhenomenaCopper CorrosionCorrosion InhibitionCorrosion Inhibition MechanismsCorrosion Inhibitor EffectsGreen Corrosion InhibitorsIsotherm Modeling
Abstract Fast green (FG), fuchsin basic (FB) and fuchsin acid (FA) were studied as copper corrosion inhibitors in citric acid solution. Five citric acid concentrations were tested from 0.001 to 1.0 M. Twelve FG, FB and FA concentrations were studied from 1 × 10 −5 to 1 × 10 −1 M, at four temperatures from 298 to 328 K. The gravimetric method was employed to study the protective effect of FG, FB and FA. The order of inhibition efficiency was FB > FA > FG. Conventional adsorption isotherms were tested to fit the experimental data. The best fit was obtained using the Frumkin isotherm model. A thermodynamic/kinetic model of adsorption was also fitted. The projected molecular area of the inhibitors was calculated to elucidate inhibitor orientation in the adsorption process.
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Abbas A. El-Awady, B.A. Abd-El-Nabey, Saadullah G. Aziz · Journal of The Electrochemical Society · 1992 · 347 citations