Influence of the electrolyte film thickness and NaCl concentration on the oxygen reduction current on platinum
authors Dolgikh, O; Bastos, AC; Oliveira, A; Dan, C; Deconinck, J
nationality International
journal CORROSION SCIENCE
author keywords Platinum; Potentiostatic; Modelling studies; Oxygen reduction
keywords THIN-LAYER ELECTROLYTES; ATMOSPHERIC CORROSION; GALVANIC CORROSION; METALS; MODEL; STEEL; DIFFUSION; ZINC; TEMPERATURE; CONVECTION
abstract Measurements of oxygen reduction current are performed on a platinum electrode submerged under NaCl electrolyte films of different thickness. The chloride concentration is kept constant or increases due to evaporation. Measurements are supported by the numerical Multi-Ion Transport and Reaction Model (MITReM). In case of constant salt concentration, oxygen reduction current is proportional to the reciprocal of the electrolyte film thicknesses down to 50-75 mu m; for lower thicknesses deviation from the Fick's law takes place. For evaporating films, oxygen current is the result of two counteracting phenomena: reducing film thickness and increasing salt concentration leading to decrease of oxygen solubility. (C) 2015 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
year published 2016
volume 102
beginning page 338
ending page 347
digital object identifier (doi) 10.1016/j.corsci.2015.10.025
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000367275700033
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journal impact factor 4.862
5 year journal impact factor 5.238
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