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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
da Silva, Rejane M. P. [1, 2] ; Izquierdo, Javier [2, 3] ; Milagre, Mariana X. [1] ; Betancor-Abreu, Abenchara M. [2] ; Costa, Isolda [1] ; Souto, Ricardo M. [2, 3]
Total Authors: 6
Affiliation:
[1] Inst Pesquisas Energet & Nucl IPEN, CNEN Av Prof Lineu Prestes 2242, Sao Paulo - Brazil
[2] Univ La Laguna, Dept Quim, POB 456, E-38200 San Cristobal la Laguna, Tenerife - Spain
[3] Univ La Laguna, Inst Mat & Nanotecnol, POB 456, E-38200 San Cristobal la Laguna, Tenerife - Spain
Total Affiliations: 3
Document type: Journal article
Source: SENSORS; v. 21, n. 4 FEB 2021.
Web of Science Citations: 1
Abstract

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. (AU)

FAPESP's process: 13/13235-6 - Investigation on the localized corrosion and the fatigue corrosion resistance of high strength aluminum alloys joined by friction stir welding (FSW)
Grantee:Isolda Costa
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/06880-6 - Use of Localized Electrochemical Techniques for the Study of Corrosion of of High Strength Aluminum Alloys Joined by Friction (FSW).
Grantee:Rejane Maria Pereira da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 19/11427-1 - Micro-electrochemical techniques to study the localized corrosion in Al-Cu-Li alloys joined by friction stir welding (FSW)
Grantee:Rejane Maria Pereira da Silva
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor