RT info:eu-repo/semantics/article
T1 Development of an Al3+ ion-selective microelectrode for the potentiometric microelectrochemical monitoring of corrosion sites on 2098-T351 aluminum alloy surfaces. 
R.M.P. da Silva, J. Izquierdo, M.X. Milagre, R.A. Antunes, R.M. Souto, I. Costa.
A1 Souto, Ricardo Manuel
A1 Da Silva, Rejane Maria P.
A1 Izquierdo Pérez, Javier
A1 Milagre, Mariana X.
A1 Antunes, Renato A.
A1 Costa, Isolda
A2 Química
A2 Grupo de Electroquímica y Corrosión
Departamento de Química
Instituto de Materiales y Nanotecnología
AB A novel potentiometric Al3+− ion selective microelectrode (ISME), with internal solid contact, based on the use ofa neutral carrier morin as ionophore is reported. The ability of the ISME to image local ion concentration distributions was tested on aluminum alloy surfaces freely corroding in an aqueous solution containing chlorideions. The microelectrode was then used as the sensing tip for scanning electrochemical microscopy (SECM) inpotentiometric operation to monitor the reactive sites associated with the dissolution of aluminum that developed in the 2098− T351 Al− Cu− Li alloy as a result of welding by the Friction Stir Welding (FSW) process. TheISME detected differences in the local concentrations of Al3+ species arising from the 2098− T351 Al− Cu− Lialloy (base material) and from the coupled weld joint/heat affected zones (WJ/HAZ) of the alloy produced by theFSW process. More active domains for Al3+ dissolution were found in the HAZ regions coupled to WJ, morespecially in the HAZ of the advancing side (AS). These results demonstrate that the Al3+− ISME presented in thiswork can be used to monitor corrosion sites on aluminum alloys surfaces with combined chemical and spatialresolution.
YR 2022
FD 2022
LK http://riull.ull.es/xmlui/handle/915/26910
UL http://riull.ull.es/xmlui/handle/915/26910
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 21-dic-2024