The co-operative effect of chloride ions and some natural extracts in retarding corrosion of steel in neutral media / A. M. Abdel-Gaber in Materials and corrosion, Vol. 63 N° 2 (Fevrier 2012)  

Public ISBD [article]  inMaterials and corrosion > Vol. 63 N° 2 (Fevrier 2012) . - pp. 161–167 Titre : The co-operative effect of chloride ions and some natural extracts in retarding corrosion of steel in neutral media Type de document : texte imprimé Auteurs : A. M. Abdel-Gaber, Auteur ; B. A. Abdel-Nabey, Auteur ; M. Saadawy, Auteur Année de publication : 2012 Article en page(s) : pp. 161–167 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion  neutral extract  steel Résumé : Effect of lupine and damsissa extracts on the corrosion of steel in 0.5 M Na2SO4 solution free from and containing 0.01 or 0.1 M NaCl were examined by potentiodynamic and electrochemical impedance spectroscopy techniques. Potentiodynamic polarization curves measurements indicated that damsissa and lupine extracts behave as anodic type inhibitors. Nyquist impedance plots showed type of distorted semicircle whose size increases with increasing concentrations of lupine or damsissa extract. Increasing chloride ion concentration in the solution led to increase of the inhibition efficiency of the extract and this behaviour was explained on the basis of co-operative mechanism of adsorption. Kinetic–thermodynamic model was used to clarify the nature of adsorption and showed good fit to the experimental data. The results indicated that lupine extract is more effective as corrosion inhibitor for steel in neutral media containing chloride ions than damsissa extract. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005678/abstract [article] The co-operative effect of chloride ions and some natural extracts in retarding corrosion of steel in neutral media [texte imprimé] / A. M. Abdel-Gaber, Auteur ; B. A. Abdel-Nabey, Auteur ; M. Saadawy, Auteur . - 2012 . - pp. 161–167. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 2 (Fevrier 2012) . - pp. 161–167 Mots-clés : Corrosion  neutral extract  steel Résumé : Effect of lupine and damsissa extracts on the corrosion of steel in 0.5 M Na2SO4 solution free from and containing 0.01 or 0.1 M NaCl were examined by potentiodynamic and electrochemical impedance spectroscopy techniques. Potentiodynamic polarization curves measurements indicated that damsissa and lupine extracts behave as anodic type inhibitors. Nyquist impedance plots showed type of distorted semicircle whose size increases with increasing concentrations of lupine or damsissa extract. Increasing chloride ion concentration in the solution led to increase of the inhibition efficiency of the extract and this behaviour was explained on the basis of co-operative mechanism of adsorption. Kinetic–thermodynamic model was used to clarify the nature of adsorption and showed good fit to the experimental data. The results indicated that lupine extract is more effective as corrosion inhibitor for steel in neutral media containing chloride ions than damsissa extract. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005678/abstract

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