Polymer Films on Electrodes:  Investigation of Ion Transport at Poly(3,4-ethylenedioxythiophene) Films by Scanning Electrochemical Microscopy†

Langmuir ◽  
2006 ◽  
Vol 22 (25) ◽  
pp. 10338-10347 ◽  
Author(s):  
Nianjun Yang ◽  
Cynthia G. Zoski
Keyword(s):  
Ion Transport ◽  
Polymer Films ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Microscopy

Investigation of Ion Transport Traversing the “Ion Channels” by Scanning Electrochemical Microscopy (SECM)

2011 ◽  
Vol 115 (11) ◽  
pp. 4800-4805 ◽  
Author(s):  
Xiaoquan Lu ◽  
Tianxia Wang ◽  
Xibing Zhou ◽  
Yao Li ◽  
Bowan Wu ◽  
...  
Keyword(s):  
Ion Channels ◽  
Ion Transport ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Microscopy

scholarly journals 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

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1132 ◽  
Author(s):  
Rejane M. P. da Silva ◽  
Javier Izquierdo ◽  
Mariana X. Milagre ◽  
Abenchara M. Betancor-Abreu ◽  
Isolda Costa ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Oxygen Depletion ◽  
Localized Corrosion ◽  
Alloy Surface ◽  
Al Alloy ◽  
Spatially Resolved ◽  
Lower Oxygen ◽  
Local Ph ◽  
Electrochemical Microscopy

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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