On the relative efficacy of electropermeation and isothermal desorption approaches for measuring hydrogen diffusivity
File(s)
Published version
Author(s)
Zafra, Alfredo
Harris, Zachary
Korec, Evzen
Martínez-Pañeda, Emilio
Type
Journal Article
Abstract
The relative efficacy of electrochemical permeation (EP) and isothermal desorption spectroscopy (ITDS) methods for determining the hydrogen diffusivity is investigated using cold-rolled pure iron. The diffusivities determined from 13 first transient and 8 second transient EP experiments, evaluated using the conventional lag and breakthrough time methods, are compared to the results of 10 ITDS experiments. Results demonstrate that the average diffusivity is similar between the second EP transient and ITDS, which are distinctly increased relative to the first EP transient. However, the coefficient of variation for the ITDS experiments is reduced by 2 and 3-fold relative to the first and second EP transients, confirming the improved repeatability of ITDS diffusivity measurements. The source of the increased error in EP measurements is systematically evaluated, revealing an important influence of assumed electrochemical boundary conditions on the analysis and interpretation of EP experiments.
Date Issued
2023-01-08
Date Acceptance
2022-10-03
Citation
International Journal of Hydrogen Energy, 2023, 48, pp.1218-1233
ISSN
0360-3199
Publisher
Elsevier BV
Start Page
1218
End Page
1233
Journal / Book Title
International Journal of Hydrogen Energy
Volume
48
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY
license (http://creativecommons.org/licenses/by/4.0/).
license (http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
https://www.sciencedirect.com/science/article/pii/S0360319922046481
Publication Status
Published
Date Publish Online
2022-10-25