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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.
da Silva, Rejane M P; Izquierdo, Javier; Milagre, Mariana X; Betancor-Abreu, Abenchara M; Costa, Isolda; Souto, Ricardo M.
Afiliación
  • da Silva RMP; Instituto de Pesquisas Energéticas e Nucleares-IPEN, CNEN-Av. Prof. Lineu Prestes, 2242 São Paulo, Brazil.
  • Izquierdo J; Departamento de Química, Universidad de La Laguna, P.O. Box 456, E-38200 La Laguna (Tenerife), Canary Islands, Spain.
  • Milagre MX; Departamento de Química, Universidad de La Laguna, P.O. Box 456, E-38200 La Laguna (Tenerife), Canary Islands, Spain.
  • Betancor-Abreu AM; Instituto de Materiales y Nanotecnología, Universidad de La Laguna, P.O. Box 456, E-38200 La Laguna (Tenerife), Canary Islands, Spain.
  • Costa I; Instituto de Pesquisas Energéticas e Nucleares-IPEN, CNEN-Av. Prof. Lineu Prestes, 2242 São Paulo, Brazil.
  • Souto RM; Departamento de Química, Universidad de La Laguna, P.O. Box 456, E-38200 La Laguna (Tenerife), Canary Islands, Spain.
Sensors (Basel) ; 21(4)2021 Feb 06.
Article en En | MEDLINE | ID: mdl-33561949
Amperometric and potentiometric probes were employed for the detection and characterization of reactive sites on the 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemical microscopy (SECM). Firstly, the probe of concept was performed on a model Mg-Al galvanic pair system using SECM in the amperometric and potentiometric operation modes, in order to address the responsiveness of the probes for the characterization of this galvanic pair system. Next, these sensing probes were employed to characterize the 2098-T351 alloy surface immersed in a saline aqueous solution at ambient temperature. The distribution of reactive sites and the local pH changes associated with severe localized corrosion (SLC) on the alloy surface were imaged and subsequently studied. Higher hydrogen evolution, lower oxygen depletion and acidification occurred at the SLC sites developed on the 2098-T351 Al-alloy.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sensors (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sensors (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza