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Corrosion behaviour improvement from the ultrafine-grained Al–Zn–In​ alloys in Al–air battery
Chiang Mai University, Thailand.
Chiang Mai University, Thailand.
National Science and Technology Development Agency, Thailand.
RISE Research Institutes of Sweden, Materials and Production, Corrosion.ORCID iD: 0000-0002-9512-9258
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2022 (English)In: Energy Reports, E-ISSN 2352-4847, Vol. 8, p. 5117-5128Article in journal (Refereed) Published
Abstract [en]

Corrosion of aluminium anode in alkaline solution is a challenging matter for the development of a long-life aluminium anode in Al–air battery. This research focuses on grain size reduction by equal channel angular pressing (ECAP) of Al, Al–Zn, and Al–Zn–In samples. The average grain size of all samples after ECAP is lower than 1μm. Open circuit potential, potentiodynamic polarisation, electrochemical impedance spectroscopy, and self-corrosion test were carried out to study the effects of alloying elements (Zn, In) and grain size reduction by ECAP on the electrochemical behaviours of aluminium alloy anodes. The results show that alloying element, zinc, can improve the stability of ion dissolution by porous Al2ZnO4 film formation. Indium can activate ion dissolution that causes enhanced electrochemical activities for Al–Zn–In sample. Moreover, increasing grain boundaries through grain size reduction can enhance more negative potential and cause a uniformly corroded surface of Al–Zn–In sample, leading to a longer anode life in alkaline solution. © 2022 The Authors

Place, publisher, year, edition, pages
Elsevier Ltd , 2022. Vol. 8, p. 5117-5128
Keywords [en]
Aluminium alloys, Al–air battery, Anode, Corrosion behaviour, Equal channel angular pressing, Ultrafine grain, Alloying, Alloying elements, Aluminum alloys, Aluminum compounds, Aluminum corrosion, Anodes, Dissolution, Electric batteries, Electrochemical corrosion, Electrochemical impedance spectroscopy, Grain boundaries, Grain size and shape, Reduction, Zinc compounds, Alkaline solutions, Aluminum anodes, Average grain size, Grain-size reduction, Long life, Research focus, Ultra fine grain, Ultra-fine grained ( UFG), Corrosive effects
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Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-59206DOI: 10.1016/j.egyr.2022.03.132Scopus ID: 2-s2.0-85128241026OAI: oai:DiVA.org:ri-59206DiVA, id: diva2:1668368
Note

Funding details: B16F640001; Funding details: Chiang Mai University, CMU; Funding details: Thailand Graduate Institute of Science and Technology, TGIST, TG-MT-CMU-62-029M; Funding details: Thailand Science Research and Innovation, TSRI; Funding text 1: This work was supported by Fundamental Fund 2022 Chiang Mai University , Thailand Science Research and Innovation (TSRI) , the Program Management Unit for Human Resources & Institutional Development Research and Innovation, NXPO [ B16F640001 ], and the Thailand Graduate Institute of Science and Technology (TGIST) grant number TG-MT-CMU-62-029M .

Available from: 2022-06-13 Created: 2022-06-13 Last updated: 2022-06-16Bibliographically approved

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Pålsson, Namurata

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