RT info:eu-repo/semantics/article
T1 Use of amperometric and potentiometric probes in scanning electrochemical microscopy for the spatially-resolved monitoring of severe localized corrosion sites on aluminum alloy 2098-T351
A1 Souto, Ricardo Manuel
A1 Da Silva, Rejane Maria P.
A1 Izquierdo Pérez, Javier
A1 Milagre, Mariana X.
A1 Betancor-Abreu, A.
A1 Costa, Isolda
A2 Química
A2 Proyecto CTQ2018-80522-P
Grupo de Electroquímica y CorrosiónInstituto de Materiales y Nanotecnología
K1 scanning electrochemical microscopy
K1 amperometric and potentiometric probes
K1 aluminum alloy 2098-T351
K1 severe localized corrosion
K1 Mg-Al galvanic pair
AB Amperometric and potentiometric probes were employed for the detection and characterizationof reactive sites on the 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemicalmicroscopy (SECM). Firstly, the probe of concept was performed on a model Mg-Al galvanic pairsystem using SECM in the amperometric and potentiometric operation modes, in order to addressthe responsiveness of the probes for the characterization of this galvanic pair system. Next, thesesensing probes were employed to characterize the 2098-T351 alloy surface immersed in a salineaqueous solution at ambient temperature. The distribution of reactive sites and the local pH changesassociated with severe localized corrosion (SLC) on the alloy surface were imaged and subsequentlystudied. Higher hydrogen evolution, lower oxygen depletion and acidification occurred at the SLCsites developed on the 2098-T351 Al-alloy
YR 2021
FD 2021
LK http://riull.ull.es/xmlui/handle/915/22284
UL http://riull.ull.es/xmlui/handle/915/22284
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 24-nov-2024