Comparison of Performance of NiCr2O4 and Cr2O3 Formed on the Ni-Based Superalloy RR1000 Under Corrosive Conditions

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dc.contributor.authorGray, S.
dc.contributor.authorMphahlele, M.
dc.contributor.authorCollins, D. M.
dc.contributor.authorJackson, C.
dc.contributor.authorHardy, M. C.
dc.contributor.authorTaylor, M. P.
dc.date.accessioned2024-09-03T12:25:33Z
dc.date.available2024-09-03T12:25:33Z
dc.date.freetoread2024-09-03
dc.date.issued2024
dc.date.pubOnline2024-07-30
dc.description.abstractSamples of the Ni-based superalloy, RR1000, were exposed to 98% Na2SO4/2% NaCl salts at 700 °C with a flux of 1.5 µg cm−2 h−1 in flowing air + 300 ppm SO2 for a total of 250 h. Three pre-exposure conditions were studied: a bare reference alloy; fast heating to the test temperature followed by a 100 h hold; heating at a rate of 5 °C min−1 to the test temperature following by a 100 h hold. The surface oxide formed under the latter two conditions were Cr2O3 or NiCr2O4, respectively. The results show corrosion pit formation on the surface of the base, reference sample, and no pits present on the sample with the preformed Cr2O3. Some protection was found for the sample heated at 5 °C min−1 with a delay in the progression to accelerated corrosion attack. Additional testing under moisture containing air was also conducted. This showed no obvious difference in surface oxide morphology under the two tested heating rates for the short-term exposures examined but a difference was noted to be dependent on the moisture content of the air.
dc.description.journalNameHigh Temperature Corrosion of Materials
dc.description.sponsorshipEngineering and Physical Sciences Research Council
dc.description.sponsorshipThis work was supported by the Rolls-Royce/EPSRC Strategic Partnership under EP/H022309/1
dc.identifier.citationGray S, Mphahlele M, Collins DM, et al., (2024) Comparison of performance of NiCr2O4 and Cr2O3 formed on the Ni-Based superalloy RR1000 under corrosive conditions. High Temperature Corrosion of Materials, Volume 101, October 2024, pp. 1091-1102
dc.identifier.eissn2731-8400
dc.identifier.elementsID549211
dc.identifier.issn2731-8397
dc.identifier.urihttps://doi.org/10.1007/s11085-024-10256-9
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/22849
dc.languageEnglish
dc.language.isoen
dc.publisherSpringer
dc.publisher.urihttps://link.springer.com/article/10.1007/s11085-024-10256-9
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectNiCr2O4 spinel
dc.subjectCr2O3
dc.subjectNi-based superalloy
dc.subjectCorrosion
dc.subjectMoisture
dc.subject30 Agricultural, Veterinary and Food Sciences
dc.subject40 Engineering
dc.subject3006 Food Sciences
dc.titleComparison of Performance of NiCr2O4 and Cr2O3 Formed on the Ni-Based Superalloy RR1000 Under Corrosive Conditions
dc.typeArticle
dc.type.subtypeJournal Article
dcterms.dateAccepted2024-07-17

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