Hydrogen absorption rate and hydrogen diffusion in a ferritic steel coated with a micro- or nanostructured ZnNi coating
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in: Electrochemistry Communications, Jahrgang 134.2022, Nr. January, 107169, 01.2022.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Hydrogen absorption rate and hydrogen diffusion in a ferritic steel coated with a micro- or nanostructured ZnNi coating
AU - Moshtaghi, Masoud
AU - Safyari, Mahdieh
AU - Mori, Gregor
N1 - Funding Information: The authors appreciate helpful discussions and resources provided by Prof. S. Kuramoto, and F. Abbasi. Publisher Copyright: © 2021 The Authors
PY - 2022/1
Y1 - 2022/1
N2 - This study investigates the effect of the microstructure of electrodeposited ZnNi coatings, in particular pores and microcracks, on hydrogen diffusion characteristics at room temperature. The hydrogen permeation behavior and thermal desorption spectra of electrodeposited ZnNi micro- and nanostructured coatings were studied and compared. The microstructures of the coatings were observed using a scanning electron microscope. The results showed that the presence of microcracks significantly influences the hydrogen diffusion behavior: in microstructured ZnNi hydrogen can diffuse along the microcracks due to the large number of microcracks present, leading to higher hydrogen absorption during electrochemical charging. Also, the high grain boundary density in the nanostructured coating leads to the presence of a larger number of strong H traps, and thus lower diffusible H content.
AB - This study investigates the effect of the microstructure of electrodeposited ZnNi coatings, in particular pores and microcracks, on hydrogen diffusion characteristics at room temperature. The hydrogen permeation behavior and thermal desorption spectra of electrodeposited ZnNi micro- and nanostructured coatings were studied and compared. The microstructures of the coatings were observed using a scanning electron microscope. The results showed that the presence of microcracks significantly influences the hydrogen diffusion behavior: in microstructured ZnNi hydrogen can diffuse along the microcracks due to the large number of microcracks present, leading to higher hydrogen absorption during electrochemical charging. Also, the high grain boundary density in the nanostructured coating leads to the presence of a larger number of strong H traps, and thus lower diffusible H content.
KW - Defects
KW - Hydrogen absorption rate
KW - Hydrogen diffusion
KW - Nanostructured ZnNi coating
KW - Thermal desorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85121390119&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2021.107169
DO - 10.1016/j.elecom.2021.107169
M3 - Article
AN - SCOPUS:85121390119
VL - 134.2022
JO - Electrochemistry Communications
JF - Electrochemistry Communications
SN - 1388-2481
IS - January
M1 - 107169
ER -