The isotherm slope. A criterion for studying the adsorption mechanism of benzotriazole on copper in sulphuric acid
Keywords:Cobre, ácido sulfúrico, benzotriazol, isoterma de adsorción, función objetivo, área molecular proyectada.
The adsorption of benzotriazole (BTA) on copper surfaces in 0.001, 0.005 and 0.01 M concentrations of sulphuric acid was investigated using gravimetric measurements. BTA was tested in concentrations from 1x10-5 to 1x10-1 M at temperatures from 298 to 328 K. The adsorption mechanism is discussed in terms of applicability of the conventional Frumkin, Bockris-Swinkels and Kastening-Holleck isotherms, among others. The best fit was obtained using the Frumkin isotherm model. The projected molecular area of BTA was calculated to elucidate inhibitor orientation in the adsorption process
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