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Role of Ca on the corrosion resistance of Mg–9Al and Mg–9Al–0.5Mn alloys

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dc.contributor.authorMingo, B.
dc.contributor.authorMohedano Sánchez, Marta
dc.contributor.authorBlawert, C.
dc.contributor.authorDel Olmo Martínez, Rubén
dc.contributor.authorHort, N.
dc.contributor.authorArrabal Durán, Raúl
dc.date.accessioned2024-07-31T07:30:25Z
dc.date.available2024-07-31T07:30:25Z
dc.date.issued2019-11-30
dc.description.abstractThe effect of Ca additions on the microstructure and corrosion resistance of Mg–9Al and Mg–9Al-0.5Mn alloys is investigated. Model alloys were used instead of a commercial AZ91 alloy in order to avoid masking effects from other alloying elements. Grain size and secondary phases were characterised with special interest in their Volta potential. Corrosion performance was evaluated by hydrogen evolution and electrochemical methods. A synergetic effect was found when Ca and Mn were added in small amounts (0.5 wt%), reaching corrosion rates up to two orders of magnitude lower than the model Mg–9Al alloy. Such improvement was associated with Ca decreasing the Volta potential of the β-phase and with Ca and Mn decreasing the galvanic activity of Fe-rich intermetallics. Precipitation of Al2Ca decreased the amount of β-phase and had a negative impact on the corrosion resistance due to its cathodic behaviour.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.citationB. Mingo, M. Mohedano, C. Blawert, R. del Olmo, N. Hort, R. Arrabal, Role of Ca on the corrosion resistance of Mg–9Al and Mg–9Al–0.5Mn alloys, Journal of Alloys and Compounds, Volume 811, 2019, 151992, ISSN 0925-8388, https://doi.org/10.1016/j.jallcom.2019.151992.
dc.identifier.doi10.1016/j.jallcom.2019.151992
dc.identifier.officialurlhttps://doi.org/10.1016/j.jallcom.2019.151992
dc.identifier.relatedurlhttps://www.sciencedirect.com/science/article/abs/pii/S0925838819332384
dc.identifier.urihttps://hdl.handle.net/20.500.14352/107263
dc.journal.titleJournal of Alloys and Compounds
dc.language.isoeng
dc.page.initial151992
dc.publisherElsevier
dc.relation.projectIDThe authors are grateful to MINECO/FEDER (Spain, Project MAT2015-66334-C3-3-R) for financial support. B. Mingo is grateful to The University of Manchester for the award of the Presidential Fellowship and M. Mohedano to MINECO (Spain) for financial support via the Ramon y Cajal Programme (RYC-2017-21843).
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu66
dc.subject.cdu620.1
dc.subject.keywordMagnesium
dc.subject.keywordCalcium
dc.subject.keywordManganese
dc.subject.keywordAlloying
dc.subject.keywordCorrosion
dc.subject.keywordVolta potential
dc.subject.ucmIngeniería química
dc.subject.ucmMateriales
dc.subject.unesco3303 Ingeniería y Tecnología Químicas
dc.subject.unesco3312 Tecnología de Materiales
dc.titleRole of Ca on the corrosion resistance of Mg–9Al and Mg–9Al–0.5Mn alloys
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number811
dspace.entity.typePublication
relation.isAuthorOfPublication160ef5bd-2d04-4f6c-b028-cb7ce4cf8d38
relation.isAuthorOfPublication34b25ac6-7332-436b-9a5c-5e70790c77e1
relation.isAuthorOfPublication6a953ac5-3b84-40fc-a995-2a00ac938151
relation.isAuthorOfPublication.latestForDiscovery160ef5bd-2d04-4f6c-b028-cb7ce4cf8d38

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