|
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 (2011)
|
|
Auteurs :
|
Q. Qu, Auteur ;
G. Gao, Auteur ;
H. Guo, Auteur
|
|
Type de document :
|
Article : texte imprimé
|
|
Dans :
|
Materials and corrosion (Vol. 62 N° 8, Août 2011)
|
|
Article en page(s) :
|
pp. 778-785
|
|
Note générale :
|
Génie Mécanique
|
|
Langues :
|
Anglais
|
|
Index. décimale :
|
620.1 (Essais des matériaux. Défauts des matériaux. Protection des matériaux)
|
|
Tags :
|
Bis(cyclohexanone) oxalyldihydrazone Cold rolled steel Copper(II) ion Corrosion Hydrochloric acid
|
|
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
|
