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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

A study on the 65-35 brass corrosion inhibitor / C. Liang in Materials and corrosion, Vol. 63 N° 4 (Avril 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 4 (Avril 2012) . - pp. 350–354 Titre : A study on the 65-35 brass corrosion inhibitor Type de document : texte imprimé Auteurs : C. Liang, Auteur ; G. Gao, Auteur ; B. Wu, Auteur Année de publication : 2012 Article en page(s) : pp. 350–354 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion;  inhibitor;  brass;  potentiostatic Résumé : The influence of new inhibitor namely 1,3-bis-diethylamino-propan-2-ol (DEAP) on the dezincification corrosion of 65-35 brass in simulated atmospheric water was studied by potentiostatic current transient measurement, solution analysis and surface evaluation techniques. Potentiostatic current transient results showed that the investigated inhibitor can effectively inhibit the chemical dissolution of brass in simulated atmospheric water. Solution analysis revealed that the weigh loss of brass electrode remarkably decreased in the presence of DEAP, changing from 7.375 × 10−3 mg (blank) to 9.567 × 10−4 mg (10−2  M). The scanning electron microscope (SEM) and electron probe microanalyzer (EPMA) measurements showed that DEAP may better adsorb to zinc component than to copper component, inhibiting the dezincification of brass in solution by a mixed complex film of Zn(II)-DEAP and Cu(I)-DEAP. The nature of the inhibited film was analyzed by an X-ray photoelectron spectroscope (XPS) analyzer. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005795/abstract [article] A study on the 65-35 brass corrosion inhibitor [texte imprimé] / C. Liang, Auteur ; G. Gao, Auteur ; B. Wu, Auteur . - 2012 . - pp. 350–354. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 4 (Avril 2012) . - pp. 350–354 Mots-clés : Corrosion;  inhibitor;  brass;  potentiostatic Résumé : The influence of new inhibitor namely 1,3-bis-diethylamino-propan-2-ol (DEAP) on the dezincification corrosion of 65-35 brass in simulated atmospheric water was studied by potentiostatic current transient measurement, solution analysis and surface evaluation techniques. Potentiostatic current transient results showed that the investigated inhibitor can effectively inhibit the chemical dissolution of brass in simulated atmospheric water. Solution analysis revealed that the weigh loss of brass electrode remarkably decreased in the presence of DEAP, changing from 7.375 × 10−3 mg (blank) to 9.567 × 10−4 mg (10−2  M). The scanning electron microscope (SEM) and electron probe microanalyzer (EPMA) measurements showed that DEAP may better adsorb to zinc component than to copper component, inhibiting the dezincification of brass in solution by a mixed complex film of Zn(II)-DEAP and Cu(I)-DEAP. The nature of the inhibited film was analyzed by an X-ray photoelectron spectroscope (XPS) analyzer. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005795/abstract