RT info:eu-repo/semantics/article
T1 Surface finishing effects on the corrosion behavior and electrochemical activity of 2098-T351 aluminum alloy investigated using scanning microelectrochemical techniques
R.M.P. da Silva, M.X. Milagre, J. Izquierdo, A.M. Betancor-Abreu, L.A. de Oliveira, J.V.S. Araujo, R.A. Antunes, R.M. Souto, I. Costa
A1 Souto, Ricardo Manuel
A1 Da Silva, Rejane Maria P.
A1 Milagre, Mariana X.
A1 Izquierdo Pérez, Javier
A1 Betancor-Abreu, Abenchara Maria
A1 De Oliveira, Leandro A.
A1 Araujo, Joao Victor de S.
A1 Antunes, Renato A.
A1 Costa, Isolda
A2 Química
A2 Departamento de Química
Grupo de Electroquímica y Corrosión
Instituto de Materiales y Nanotecnología
AB The effects of surface finishing on the corrosion behavior and electrochemical activity of AA2098-T351(Al–Cu–Li alloy) were investigated on the basis of the correlation between surface chemistry, microstructureand electrochemical activity. The alloy was evaluated in the as-received and polished conditions. Themorphology of the two types of surfaces was investigated using confocal laser scanning microscopy (CLSM),optical microscopy and optical 3D profilometry. The surface chemistry was analyzed by X-ray photoelectronspectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). Scanning microelectrochemical techniques(namely, localized electrochemical impedance spectroscopy (LEIS), the scanning vibrating electrode technique(SVET) and scanning electrochemical microscopy (SECM) in potentiometric mode) were used to examine theelectrochemical activity of the surfaces. The results showed that on the as-received surface, the near surfacedeformed layer (NSDL), which is composed of Mg-rich bands, influenced the corrosion activity of the alloy.Higher electrochemical activity and greater susceptibility to severe localized corrosion were related to thepolished surface condition compared to the as-received one.
YR 2022
FD 2022
LK http://riull.ull.es/xmlui/handle/915/29151
UL http://riull.ull.es/xmlui/handle/915/29151
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 18-nov-2024