| Titre : | Influence of heat treatment on corrosion behaviour of Al_Zn_Mg_Cu_Zr_Sc alloy (2012) |
| Auteurs : | Y. P. Xiao, Auteur ; Q. L. Pan, Auteur ; W.B. Li, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Materials and corrosion (Vol. 63 N° 5, Mai 2012) |
| Article en page(s) : | pp. 421–430 |
| Note générale : | Génie mécanique |
| Langues : | Anglais |
| Tags : | Al_Zn_Mg_Cu_Zr_Sc alloy ; exfoliation corrosion ; heat treatment ; electrochemical impedance spectroscopy ; polarization |
| Résumé : | Corrosion behaviour of different tempers (namely NA, UA, PA and OA) of Al_Zn_Mg_Cu_Zr_Sc alloy was studied by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), optical microscopy (OM) and transmission electron microscopy (TEM). Over aged (OA) can decrease the susceptibility to exfoliation due to the discontinuous distribution of the η precipitates at the grain boundaries, cause a negative shift of the corrosion potential (Ecorr) and lead to the prolonging of the time of the appearance of two time constants in impedance diagrams. In addition, Al_Zn_Mg_Cu_Zr_Sc alloy with over aged treatment has an enhanced resistance to exfoliation corrosion. |
| En ligne : | http://onlinelibrary.wiley.com/doi/10.1002/maco.201005923/abstract |
