RT info:eu-repo/semantics/article
T1 Application of AC-SECM in corrosion science: Local visualization of heterogeneous chemical activity in AA2024 surfaces
A1 Souto, Ricardo Manuel
A1 Izquierdo Pérez, Javier
A1 González, Sergio
A2 Química
A2 Grupo de Electroquímica y Corrosión
Departamento de Química
Instituto de Materiales y Nanotecnología
K1 AA2024
K1 SECM
K1 AC-SECM
K1 aluminium alloy
K1 intermetallic particles
K1 localized corrosion
AB Aluminium alloy AA2024-T3 surfaces have been characterised by using a new microelectrochemical technique, frequency-dependent alternating current scanning electrochemical microscopy (AC-SECM), which does not require the addition of any redox active species to the electrolyte solution. Information regarding the topography and/or redox activity of the solid/liquid interface is obtained in situ, allowing their evolution with time to be monitored with high spatial resolution. By scanning the microelectrode over the surface, an image is generated, as well as information concerning reactions that take place in the solution space between the tip and the sample or on the surface of the scanned sample. A heterogeneous response due to the presence of intermetallic inclusions precipitated in the material is found on AA2024-T3 surfaces. The highly localized anodic activity was thus detected, which has been interpreted as a result of the galvanic coupling between the matrix and the intermetallic particles
YR 2012
FD 2012
LK http://riull.ull.es/xmlui/handle/915/19024
UL http://riull.ull.es/xmlui/handle/915/19024
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-nov-2024