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Numerical modelling of the electrochemical behaviour of 316 stainless steel based upon static and dynamic experimental microcapillary‐based techniques: effect of electrolyte flow and capillary size
Author(s) -
Krawiec Halina,
Vignal Vincent,
Akid Robert
Publication year - 2008
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2753
Subject(s) - electrochemistry , microcell , electrolyte , dissolution , materials science , corrosion , aqueous solution , hydrogen , electrochemical cell , capillary action , work (physics) , metallurgy , electrode , chemistry , chemical engineering , composite material , thermodynamics , organic chemistry , computer science , engineering , operating system , physics
The objective of this work was to determine the parameters that affect the mass transport and the distribution of species in microcapillaries close to the specimen surface. Local experiments were carried out under static and flow conditions on type 316L stainless steel in 1.7 M NaCl, pH = 3, by means of the electrochemical microcell and the scanning droplet cell technique. The polarisation behaviour of pure iron (used as a model system) in an aqueous environment was calculated adopting a finite element approach and was compared to the experimental results. The corrosion system consists of three parallel electrochemical reactions: the oxygen reduction reaction (ORR), the hydrogen evolution reaction (HER) and iron dissolution. Copyright © 2008 John Wiley & Sons, Ltd.