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Co-effect of bis(cyclohexanone) oxalyldihydrazone and copper(II) ion on the corrosion of cold rolled steel in 0.5 M hydrochloric acid solution / Q. Qu in Materials and corrosion, Vol. 62 N° 8 (Août 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 778-785 Titre : Co-effect of bis(cyclohexanone) oxalyldihydrazone and copper(II) ion on the corrosion of cold rolled steel in 0.5 M hydrochloric acid solution Type de document : texte imprimé Auteurs : Q. Qu, Auteur ; G. Gao, Auteur ; H. Guo, Auteur Année de publication : 2011 Article en page(s) : pp. 778-785 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Bis(cyclohexanone)  oxalyldihydrazone  Cold  rolled  steel  Copper(II)  ion  Corrosion  Hydrochloric  acid Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Effects of bis(cyclohexanone) oxalyldihydrazone (BCO) and copper(II) ion (Cu2+) on the corrosion of cold rolled steel (CRS) in 0.5 M hydrochloric acid (HCl) solution were investigated using Tafel polarization curve and electrochemical impedance spectroscopy (EIS) at 20 °C. Results elucidate that the inhibition efficiency increases with increase in BCO concentration, and the addition of 10−5 M Cu2+ significantly enhances the inhibition efficiency of BCO. Polarization curve results elucidate that the single BCO acts as a mixed-type inhibitor while the combination of Cu2+ and BCO acts as cathodic inhibitor. Ultraviolet and visible spectrophotometer (UV–Vis) results show that BCO molecules do not interact with Cu2+ and Fe2+ in 0.5 M HCl solution. Atomic force microscope (AFM) result indicates that a protective layer forms on CRS surface after immersion in 0.5 M HCl containing BCO in the absence and presence of Cu2+. The adsorption of BCO is found to follow the Langmuir adsorption isotherm in the presence and absence of Cu2+. The mechanism of typically chemical adsorption is proposed via the value of free energy of adsorption (ΔG) in the presence of BCO and Cu2+. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905522/abstract [article] Co-effect of bis(cyclohexanone) oxalyldihydrazone and copper(II) ion on the corrosion of cold rolled steel in 0.5 M hydrochloric acid solution [texte imprimé] / Q. Qu, Auteur ; G. Gao, Auteur ; H. Guo, Auteur . - 2011 . - pp. 778-785. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 778-785 Mots-clés : Bis(cyclohexanone)  oxalyldihydrazone  Cold  rolled  steel  Copper(II)  ion  Corrosion  Hydrochloric  acid Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Effects of bis(cyclohexanone) oxalyldihydrazone (BCO) and copper(II) ion (Cu2+) on the corrosion of cold rolled steel (CRS) in 0.5 M hydrochloric acid (HCl) solution were investigated using Tafel polarization curve and electrochemical impedance spectroscopy (EIS) at 20 °C. Results elucidate that the inhibition efficiency increases with increase in BCO concentration, and the addition of 10−5 M Cu2+ significantly enhances the inhibition efficiency of BCO. Polarization curve results elucidate that the single BCO acts as a mixed-type inhibitor while the combination of Cu2+ and BCO acts as cathodic inhibitor. Ultraviolet and visible spectrophotometer (UV–Vis) results show that BCO molecules do not interact with Cu2+ and Fe2+ in 0.5 M HCl solution. Atomic force microscope (AFM) result indicates that a protective layer forms on CRS surface after immersion in 0.5 M HCl containing BCO in the absence and presence of Cu2+. The adsorption of BCO is found to follow the Langmuir adsorption isotherm in the presence and absence of Cu2+. The mechanism of typically chemical adsorption is proposed via the value of free energy of adsorption (ΔG) in the presence of BCO and Cu2+. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905522/abstract