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Influence of natural seawater variables on the corrosion behaviour of aluminium-magnesium alloy

2023-02Journal article Open access
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dc.contributor.authorMarques, Maria João
dc.contributor.authorBenedetti, A.
dc.contributor.authorCastelli, F.
dc.contributor.authorDelucchi, Marina
dc.contributor.authorFaimali, Marco
dc.contributor.authorDelsante, S.
dc.contributor.authorValenza, F.
dc.contributor.authorGaraventa, F.
dc.contributor.authorPavanello, G.
dc.contributor.authorBasseguy, Regine
dc.date.accessioned2024-02-07T10:27:34Z
dc.date.available2024-02-07T10:27:34Z
dc.date.issued2023-02
dc.description.abstractABSTRACT: Corrosion is an important issue for alloys in natural seawater, where microorganisms can accelerate or mitigate corrosion. Al-Mg alloys are used for marine activities and various associated technologies. Here, the behaviour of AA5083 alloy was investigated in natural seawater with marine exposure lasting up to 50 days and detailing the first 8 days in two experimental series.Experimental work was carried out, including semi-field tests in natural seawater (biotic conditions) compared with abiotic conditions. The open circuit potential (OCP) measurements, during the immersion time, exhibited significantly different behaviours: an OCP downward displacement occurred under abiotic conditions, while, in biotic conditions OCP remained generally stable since the beginning of the immersion, revealing an inhibiting effect of the biological activity on the Al-Mg corrosion. This was accompanied by different surface modifications under biotic conditions: surface and cross-section characterization, performed by scanning electron microscopy with energy dispersive X-ray spectroscopy, showed less corrosion developed on the surface after 8-day immersion and formation of a protective layer during 50-day immersion.The present study shows that marine biological activity positively influences the Al alloy corrosion process, with surface modifications resulting in a protective effect counteracting the aggressiveness of chloride ions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMarques, Maria João... et.al - Influence of natural seawater variables on the corrosion behaviour of aluminium-magnesium alloy. In: Bioelectrochemistry, 2023, vol. 149, article nº 108321pt_PT
dc.identifier.doi10.1016/j.bioelechem.2022.108321pt_PT
dc.identifier.issn1567-5394
dc.identifier.urihttp://hdl.handle.net/10400.9/4245
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.bioelechem.2022.108321pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMaterialspt_PT
dc.subjectAluminium alloyspt_PT
dc.subjectCorrosion protectionpt_PT
dc.subjectSeawaterpt_PT
dc.titleInfluence of natural seawater variables on the corrosion behaviour of aluminium-magnesium alloypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleBioelectrochemistrypt_PT
oaire.citation.volume149pt_PT
person.familyNameMarques
person.familyNameDELUCCHI
person.familyNameFaimali
person.familyNameBASSEGUY
person.givenNameMaria João
person.givenNameMARINA
person.givenNameMarco
person.givenNameRegine
person.identifier602156
person.identifier.orcid0000-0003-4694-2485
person.identifier.orcid0000-0001-6640-898X
person.identifier.orcid0000-0001-5558-3555
person.identifier.orcid0000-0002-3571-7613
person.identifier.scopus-author-id56249952100
person.identifier.scopus-author-id7003402287
person.identifier.scopus-author-id6602752065
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication9d03d5ee-d8e5-428a-a487-f2f51b019272
relation.isAuthorOfPublication33cc3428-6771-41e1-b830-b1a5fa113c94
relation.isAuthorOfPublicationcd24fd0b-ac32-45b8-88f3-db365215843c
relation.isAuthorOfPublication6d79c287-8e89-439e-9aef-9d3523443100
relation.isAuthorOfPublication.latestForDiscovery6d79c287-8e89-439e-9aef-9d3523443100

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