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The inhibitive effect of 5-amino-indole on the corrosion of mild steel in acidic media / M. Dudukcu in Materials and corrosion, Vol. 62 N° 3 (Mars 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 3 (Mars 2011) . - pp. 264–268 Titre : The inhibitive effect of 5-amino-indole on the corrosion of mild steel in acidic media Type de document : texte imprimé Auteurs : M. Dudukcu, Auteur Année de publication : 2011 Article en page(s) : pp. 264–268 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Adsorption  5-amino-indole  Corrosion  inhibition  Electrochemical  impedance  spectroscopy  (EIS) Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The inhibitor performance of 5-aminoindole (5-AI) on mild steel corrosion in 0.5 M HCl was investigated in relation to the inhibitor concentration using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization (LPR) methods. The effect of immersion time on the corrosion behavior of mild steel was also studied. The impedance data obtained were fitted and modeled using an equivalent circuit model. The results show that 5-AI is an effective inhibitor and has an inhibition efficiency of 90% at 1 × 10−2  M additive concentration. The adsorption behavior of 5-AI was also investigated. For this purpose, the adsorption equilibrium constant (Kads), and the free energy of adsorption (ΔGads) were calculated and discussed. It was found that 5-AI acts as mixed-type inhibitor and obeys Langmuir adsorption isotherm with a free energy of adsorption of −27.71 kJ/mol. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905524/abstract [article] The inhibitive effect of 5-amino-indole on the corrosion of mild steel in acidic media [texte imprimé] / M. Dudukcu, Auteur . - 2011 . - pp. 264–268. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 3 (Mars 2011) . - pp. 264–268 Mots-clés : Adsorption  5-amino-indole  Corrosion  inhibition  Electrochemical  impedance  spectroscopy  (EIS) Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The inhibitor performance of 5-aminoindole (5-AI) on mild steel corrosion in 0.5 M HCl was investigated in relation to the inhibitor concentration using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization (LPR) methods. The effect of immersion time on the corrosion behavior of mild steel was also studied. The impedance data obtained were fitted and modeled using an equivalent circuit model. The results show that 5-AI is an effective inhibitor and has an inhibition efficiency of 90% at 1 × 10−2  M additive concentration. The adsorption behavior of 5-AI was also investigated. For this purpose, the adsorption equilibrium constant (Kads), and the free energy of adsorption (ΔGads) were calculated and discussed. It was found that 5-AI acts as mixed-type inhibitor and obeys Langmuir adsorption isotherm with a free energy of adsorption of −27.71 kJ/mol. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905524/abstract