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9 pages, 7 figures, 2 tables.[EN] The adsorption of benzotriazole (BTA) on copper surfaces in 0.001, 0.005 and 0.01 M\udconcentrations of sulphuric acid was investigated using gravimetric measurements. BTA\udwas tested in concentrations from 1x10 to 1x10 M at temperatures from 298 to 328 K.\udThe adsorption mechanism is discussed in terms of applicability of the conventional\udFrumkin, Bockris-Swinkels and Kastening-Holleck isotherms, among others. The best fit\udwas obtained using the Frumkin isotherm model. The projected molecular area of BTA was\udcalculated to elucidate inhibitor orientation in the adsorption process.[ES] En el presente trabajo se estudia la adsorción del benzotriazol (BTA) sobre el cobre en\udsolución de ácido sulfúrico con concentraciones de 0,001, 0,005 y 0,01 M utilizando\udmedidas gravimétricas. La concentración de BTA ensayada varió de 1x10'^ M a 1x10'^ M\udy la temperatura de 298 K a 328 K. El mecanismo de adsorción se analiza en términos de la\udaplicabilidad de las isotermas convencionales de Frumkin, Bockris-Swinkels y Kastening-\udHoUeck, entre otras. La mejor descripción de los resultados se obtuvo utilizando la isoterma\udde Frumkin. Para analizar la orientación del BTA en el proceso de adsorción sobre el cobre,\udse calculó la superficie de la molécula de BTA.Peer reviewe

The isotherm slope. A criterion for studying the adsorption mechanism of benzotriazole on copper in sulphuric acid