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Title: Oxygen Reduction on Stainless Steel in Concentrated Chloride Media

Abstract

In this work, a rotating disk electrode was used to measure the cathodic kinetics on stainless steel as a function of diffusion layer thickness (6 to 60 pm) and chloride concentration (0.6 to 5.3 M NaCl). It was found that while the cathodic kinetics followed the Levich equation for large diffusion layer thicknesses, the Levich equation over predicts the mass-transfer limited current density for diffusion layer thicknesses less than 20 Am. Also, an unusual transitory response between the activation and mass-transfer controlled regions was observed for small diffusion layer thicknesses that was more apparent in lower concentration solutions. The presence and reduction of an oxide film and a transition in the oxygen reduction mechanism were identified as possible reasons for this response. The implications of these results on atmospheric corrosion kinetics under thin electrolyte layers is discussed.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2];  [1];  [1]; ORCiD logo [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Virginia, Charlottesville, VA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1485851
Report Number(s):
SAND-2018-12750J
Journal ID: ISSN 0013-4651; 669701
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 165; Journal Issue: 13; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Alexander, Christopher L., Liu, Chao, Alshanoon, Ali, Katona, Ryan M., Kelly, Robert G., Carpenter, Jacob, Bryan, Charles, and Schindelholz, Eric. Oxygen Reduction on Stainless Steel in Concentrated Chloride Media. United States: N. p., 2018. Web. doi:10.1149/2.0181813jes.
Alexander, Christopher L., Liu, Chao, Alshanoon, Ali, Katona, Ryan M., Kelly, Robert G., Carpenter, Jacob, Bryan, Charles, & Schindelholz, Eric. Oxygen Reduction on Stainless Steel in Concentrated Chloride Media. United States. doi:10.1149/2.0181813jes.
Alexander, Christopher L., Liu, Chao, Alshanoon, Ali, Katona, Ryan M., Kelly, Robert G., Carpenter, Jacob, Bryan, Charles, and Schindelholz, Eric. Thu . "Oxygen Reduction on Stainless Steel in Concentrated Chloride Media". United States. doi:10.1149/2.0181813jes. https://www.osti.gov/servlets/purl/1485851.
@article{osti_1485851,
title = {Oxygen Reduction on Stainless Steel in Concentrated Chloride Media},
author = {Alexander, Christopher L. and Liu, Chao and Alshanoon, Ali and Katona, Ryan M. and Kelly, Robert G. and Carpenter, Jacob and Bryan, Charles and Schindelholz, Eric},
abstractNote = {In this work, a rotating disk electrode was used to measure the cathodic kinetics on stainless steel as a function of diffusion layer thickness (6 to 60 pm) and chloride concentration (0.6 to 5.3 M NaCl). It was found that while the cathodic kinetics followed the Levich equation for large diffusion layer thicknesses, the Levich equation over predicts the mass-transfer limited current density for diffusion layer thicknesses less than 20 Am. Also, an unusual transitory response between the activation and mass-transfer controlled regions was observed for small diffusion layer thicknesses that was more apparent in lower concentration solutions. The presence and reduction of an oxide film and a transition in the oxygen reduction mechanism were identified as possible reasons for this response. The implications of these results on atmospheric corrosion kinetics under thin electrolyte layers is discussed.},
doi = {10.1149/2.0181813jes},
journal = {Journal of the Electrochemical Society},
number = 13,
volume = 165,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 2 works
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