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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.)

Near-surface solution pH measurements during the pitting corrosion of AISI 1020 steel using a ring-shaped sensor

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da Silva, Marina Medina ; Mascaro, Lucia Helena ; Pereira, Ernesto Chaves ; Zimer, Alexsandro Mendes
Total Authors: 4
Document type: Journal article
Source: Journal of Electroanalytical Chemistry; v. 780, p. 379-385, NOV 1 2016.
Web of Science Citations: 2

This work presents the development and characterization of a ring-shaped sensor built around a steel sample (AISI 1020) to determine the near-surface solution pH (NSSpH) duringpitting corrosion. The pH sensor is constituted by a ring of IrOx, a material that is sensitive to pH changes, synthesized using the Pechini method on a glass tube with a gap of 1 mm between the pH. sensor (ring) and the metal sample (disc). The evolution of the corrosion process was also followed using a temporal series of micrographs with an optical microscope. At the same time, the sensor followed the NSSpH during the passivation of the metal, during the breakdown of the passive film, and during the pit evolution in an aqueous basic solution containing HCO3- and Cl- species. When the pit potential was reached, the NSSpH was reduced by one pH unit. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 11/19430-0 - In situ investigation of carbon steel corrosion by means of temporal series micrographs coupled with electrochemical techniques
Grantee:Alexsandro Mendes Zimer
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/13503-0 - Development of sensor for interfacial-pH analysis during the pit corrosion observed in situ by temporal series micrographs
Grantee:Marina Medina da Silva
Support type: Scholarships in Brazil - Scientific Initiation