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