Mechanical and electrochemical corrosion properties of stochastic open-cell Al-, Ni/Al- and Ni/PU foams
Publication date
2026-07-27
Document type
Forschungsartikel
Author
Felten, Markus
Fries, Michael
Kunz, Francesco
Firoozbakht, Mahan
Schäfer, Florian
Motz, Christian
Becker, Maike
Lutz, Alexander
Zander, Daniela
Organisational unit
Scopus ID
Publisher
Elsevier
Series or journal
Materials & Design
ISSN
Periodical volume
269
Article ID
116693
Peer-reviewed
✅
Part of the university bibliography
✅
Language
English
Keyword
Corrosion
Mechanics
Metal foam
Yield surface
Abstract
Aluminum (Al) alloys are the most commonly used materials for stochastic open-cell metal foams. However, alternative nickel (Ni)-based systems, such as stochastic open-cell Ni/polyurethane and Ni/Al foams, have achieved considerable technological advancement in recent years. The present study provides a direct comparison of these material systems with respect to their initial mechanical properties, their electrochemical corrosion behavior in a stagnant 3.5 wt.% NaCl electrolyte and the resulting impact on the mechanical performance after six months of immersion. The results reveal a lower initial mechanical strength and energy absorption capacity for the Al foam system. Moreover, the stochastic open-cell Al foams exhibit microgalvanically induced dissolution, leading to a linear degradation of the mechanical properties under uniaxial compression. In contrast, the Ni-based systems show a significantly reduced effect of electrochemical corrosion on their mechanical behavior. Overall, the findings demonstrate a distinct advantage of the Ni-based material systems for energy absorption applications under realistic service conditions compared to stochastic open-cell Al foams.
Description
This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).
Version
Published version
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