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High-temperatures corrosion of AISI 316L and AISI 430 steels in dynamic conditions with molten solar salt

2022-11Conference object Open access
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dc.contributor.authorPedrosa, Fátima
dc.contributor.authorPaiva Luís, Teresa
dc.contributor.authorFigueira Vasques, Isabel
dc.contributor.authorCunha Diamantino, Teresa
dc.date.accessioned2022-11-21T16:34:18Z
dc.date.available2022-11-21T16:34:18Z
dc.date.issued2022-11
dc.description.abstractABSTRACT: Potassium nitrate and sodium nitrate in mixing proportion of KNO3–NaNO3 40-60 wt% (also called solar salt) has been successfully used for over a decade as a heat storage medium for concentrated solar power plants. At temperatures of 550 ºC, reached in state-of-the-art solar tower systems, corrosion of metallic components in contact with solar salt can become an issue and has caused leaks and plant shut-downs in recently built tower projects. While the corrosion rates of several materials have been determined for different temperatures in static molten salt immersion experiments, there is a lack of corrosion data for dynamic inservice conditions. Fluid dynamics and scale-up are two factors that can influence the corrosion phenomena. In this work, corrosion studies were carried out on austenitic stainless steel (SS) (AISI 316L) and ferritic steel (AISI 430) under dynamic conditions, with long-term immersion in solar salt, on a pilot scale. It was found that AISI 316L steel forming more adherent oxides, presented a significantly lower corrosion rate than the AISI 430 steel, due to the formation of a protective FeCr2O4 layer, making it less susceptible to corrosion. The measured corrosion rates are presented and compared to static corrosion tests.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPedrosa, F... [et.al.] - High-temperatures corrosion of AISI 316L and AISI 430 steels in dynamic conditions with molten solar salt. In: Livro de Resumos : 8as Jornadas de Corrosão e Proteção de Materiais, Fórum Tecnológico, Lisboa, 24 novembro, 2022, p. 39-41pt_PT
dc.identifier.doi10.34637/hs87-jt55pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.9/3945
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherLNEG - Laboratório Nacional de Energia e Geologiapt_PT
dc.relationLISBOA-01-0145-FEDER-022113pt_PT
dc.relationSolar Facilities for the European Research Area - Third Phase
dc.relation.publisherversionhttps://doi.org/10.34637/hs87-jt55pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHigh-temperature corrosionpt_PT
dc.subjectSolar saltpt_PT
dc.subjectDynamic corrosion testspt_PT
dc.subjectThermal energy storagept_PT
dc.titleHigh-temperatures corrosion of AISI 316L and AISI 430 steels in dynamic conditions with molten solar saltpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleSolar Facilities for the European Research Area - Third Phase
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/823802/EU
oaire.citation.conferencePlaceLisboa, Portugalpt_PT
oaire.citation.endPage41pt_PT
oaire.citation.startPage39pt_PT
oaire.citation.title8as Jornadas de Corrosão e Proteção de Materiaispt_PT
oaire.fundingStreamH2020
person.familyNamePedrosa
person.familyNamePaiva Luís
person.familyNameFigueira Vasques
person.familyNameCunha Diamantino
person.givenNameFátima
person.givenNameTeresa
person.givenNameIsabel
person.givenNameTeresa
person.identifier.ciencia-idA81C-1FE7-1D42
person.identifier.orcid0000-0002-0479-822X
person.identifier.orcid0000-0002-3000-5246
person.identifier.orcid0000-0002-0977-7786
person.identifier.orcid0000-0002-0481-0460
person.identifier.ridG-5063-2017
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication2ce2b103-1205-4c2a-8799-fd7d9f5f7800
relation.isAuthorOfPublication2538defb-b9bf-45d7-b067-8261ef759809
relation.isAuthorOfPublication0e1d82cf-cf81-4c2f-a662-ef60cc2bf3f6
relation.isAuthorOfPublication706d0686-58f1-440b-a903-6f57130b962c
relation.isAuthorOfPublication.latestForDiscovery706d0686-58f1-440b-a903-6f57130b962c
relation.isProjectOfPublicatione8d1d421-bea2-4b79-a56d-dc3ed7c519d0
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