Influence of the electrolyte film thickness and NaCl concentration on the oxygen reduction current on platinum

被引：32

作者：

Dolgikh, O. ^{[1
]}

Bastos, A. C. ^{[2
]}

Oliveira, A. ^{[2
]}

Dan, C. ^{[1
]}

Deconinck, J. ^{[1
]}

机构：

[1] Vrije Univ Brussel, Res Grp SURF, B-1050 Brussels, Belgium

[2] Univ Aveiro, DEMaC CICECO, P-3810193 Aveiro, Portugal

来源：

CORROSION SCIENCE | 2016年 / 102卷

关键词：

Platinum; Potentiostatic; Modelling studies; Oxygen reduction; ATMOSPHERIC CORROSION; GALVANIC CORROSION; THIN; LAYER; METALS; MODEL; STEEL; DIFFUSION; ZINC; IMPEDANCE;

D O I：

10.1016/j.corsci.2015.10.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：338 / 347

页数：10

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