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Effect of temperature on the corrosion inhibition of nonionic surfactant TRITON - X - 405 on ferritic stainless steel in 1.0 M H2SO4 / Regina Fuchs - Godec in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 274–284 Titre : Effect of temperature on the corrosion inhibition of nonionic surfactant TRITON - X - 405 on ferritic stainless steel in 1.0 M H2SO4 Type de document : texte imprimé Auteurs : Regina Fuchs - Godec, Auteur ; Miomir G. Pavlovic, Auteur ; Milorad V. Tomic, Auteur Année de publication : 2012 Article en page(s) : pp. 274–284 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Corrosion  Nonionic  Stainless  steel Résumé : The inhibiting action of a nonionic surfactant of the TRITON-X series (TRITON-X-405) on stainless steel type X4Cr13 in 1.0 M H2SO4 solution within the temperature range of 25–45 °C was studied using the gravimetric and potentiodynamic technique. The inhibition efficiency was found to increase with the inhibitor concentration and decrease with temperature. The satisfactory inhibition efficiency of TRITON-X-405 on SS type X4Cr13 in 1.0 M H2SO4 was limited to temperatures below 35 °C or at the surfactant concentration higher than c = 10–5 M. The adsorption of TRITON-X-405 on stainless steel type X4Cr13 in one molar of sulphuric acid within the chosen temperature range follows the Flory–Huggins adsorption model with very high negative values of the free energy of adsorption ΔGads. The thermodynamic parameters, such as the heat of adsorption and adsorption entropy, were calculated by employing thermodynamic equations. Activation parameters such as apparent activation energy, activation enthalpy, and activation entropy were evaluated from the effect of temperature on corrosion and inhibition processes. Those entire apparent activation parameters show an increase–decrease characteristic (a nonmonotonic function). They increased at concentrations lower than the cmc of added surfactant and decreased when the concentration of TRITON-X-405 was higher than c = 10–5 M. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2015697 [article] Effect of temperature on the corrosion inhibition of nonionic surfactant TRITON - X - 405 on ferritic stainless steel in 1.0 M H2SO4 [texte imprimé] / Regina Fuchs - Godec, Auteur ; Miomir G. Pavlovic, Auteur ; Milorad V. Tomic, Auteur . - 2012 . - pp. 274–284. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 274–284 Mots-clés : Corrosion  Nonionic  Stainless  steel Résumé : The inhibiting action of a nonionic surfactant of the TRITON-X series (TRITON-X-405) on stainless steel type X4Cr13 in 1.0 M H2SO4 solution within the temperature range of 25–45 °C was studied using the gravimetric and potentiodynamic technique. The inhibition efficiency was found to increase with the inhibitor concentration and decrease with temperature. The satisfactory inhibition efficiency of TRITON-X-405 on SS type X4Cr13 in 1.0 M H2SO4 was limited to temperatures below 35 °C or at the surfactant concentration higher than c = 10–5 M. The adsorption of TRITON-X-405 on stainless steel type X4Cr13 in one molar of sulphuric acid within the chosen temperature range follows the Flory–Huggins adsorption model with very high negative values of the free energy of adsorption ΔGads. The thermodynamic parameters, such as the heat of adsorption and adsorption entropy, were calculated by employing thermodynamic equations. Activation parameters such as apparent activation energy, activation enthalpy, and activation entropy were evaluated from the effect of temperature on corrosion and inhibition processes. Those entire apparent activation parameters show an increase–decrease characteristic (a nonmonotonic function). They increased at concentrations lower than the cmc of added surfactant and decreased when the concentration of TRITON-X-405 was higher than c = 10–5 M. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2015697