|
authors |
Lamaka, SV; Taryba, M; Montemor, MF; Isaacs, HS; Ferreira, MGS |
|
nationality |
International |
|
journal |
ELECTROCHEMISTRY COMMUNICATIONS |
|
author keywords |
SVET; Simultaneous; pH; Vibrating probe; SIET |
|
keywords |
CORROSION PROTECTION; GALVANIZED STEEL; CUT EDGE; SVET; MICROSCOPY; COMPOSITES; ALUMINUM; ALLOY |
|
abstract |
This work reports a new methodology to measure quasi-simultaneously the local electric fields and the distribution of specific ions in a solution via selective microelectrodes. The field produced by the net electric current was detected using the scanning vibrating electrode technique (SVET) with quasi-simultaneous measurements of pH with an ion-selective microelectrode (pH-SME). The measurements were performed in a validation cell providing a 48 mu m diameter Pt wire cross section as a source of electric current. A time lag between acquiring each current density and pH data-point was 1.5 s due to the response time of pH-SME. The quasi-simultaneous SVET-pH measurements that correlate electrochemical oxidation-reduction processes with acid-base chemical equilibria are reported for the first time. No cross-talk between the vibrating microelectrode and the ion-selective microelectrode could be detected under given experimental conditions. (C) 2010 Elsevier B.V. All rights reserved. |
|
publisher |
ELSEVIER SCIENCE INC |
|
issn |
1388-2481 |
|
year published |
2011 |
|
volume |
13 |
|
issue |
1 |
|
beginning page |
20 |
|
ending page |
23 |
|
digital object identifier (doi) |
10.1016/j.elecom.2010.11.002 |
|
web of science category |
Electrochemistry |
|
subject category |
Electrochemistry |
|
unique article identifier |
WOS:000286854000006
|
