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Modelling and corrosion of coated stainless steel substrates for bipolar plates at different temperatures
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Steinhorst, Maximilian, Auinger, Michael, Roch, Teja and Leyens, Christoph (2023) Modelling and corrosion of coated stainless steel substrates for bipolar plates at different temperatures. Journal of Applied Electrochemistry, 53 . 1491-1503 . doi:10.1007/s10800-023-01855-6 ISSN 0021-891X.
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WRAP-Modelling-and-corrosion-of-coated-stainless-steel-substrates-for-bipolar-plates-at-different-temperatures-Auinger-2023.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (2931Kb) | Preview |
Official URL: https://doi.org/10.1007/s10800-023-01855-6
Abstract
The corrosion behaviour of coated stainless steel as bipolar plate material in PEM fuel cell applications and its improvement through the surface modifications was investigated. A commercial SS316L stainless steel grade was deposited with thin multi-layer coatings, consisting of a carbon top layer and a chromium interlayer of two different thicknesses. Interfacial contact resistance measurements revealed that the applied Cr/C coatings are highly conductive and surpass the ICR criteria, suggested by the U.S. Department of Energy. Corrosion resistance was thoroughly analysed by potentiodynamic polarisation and cyclic voltammetry in 0.5 M H2SO4 at room temperature and 80 °C, respectively, combined with numerical modelling. Electrochemical results agree well with numerical modelling, including the dissolution of metallic species, local pH-shifts and changes of electrolyte conductivity. Furthermore, the study shows that the application of a Cr/C coating significantly reduces the current density in the passive region during potentiodynamic polarisation and lowering the corrosion rate of the steel substrate by at least a factor of two.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Stainless steel -- Corrosion, Stainless steel -- Effect of temperature on, Proton exchange membrane fuel cells -- Materials, Proton exchange membrane fuel cells -- Design and construction, Protective coatings | ||||||||
| Journal or Publication Title: | Journal of Applied Electrochemistry | ||||||||
| Publisher: | Springer Netherlands | ||||||||
| ISSN: | 0021-891X | ||||||||
| Official Date: | July 2023 | ||||||||
| Dates: |
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| Volume: | 53 | ||||||||
| Page Range: | 1491-1503 | ||||||||
| DOI: | 10.1007/s10800-023-01855-6 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 31 January 2023 | ||||||||
| Date of first compliant Open Access: | 20 February 2023 | ||||||||
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