High temperature corrosion of HVOF coatings in laboratory-simulated biomass combustion superheater environments

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dc.contributor.authorPidcock, Andy
dc.contributor.authorMori, Stefano
dc.contributor.authorSumner, Joy
dc.contributor.authorSimms, Nigel
dc.contributor.authorNicholls, John
dc.contributor.authorOakey, John
dc.date.accessioned2023-01-09T10:30:09Z
dc.date.available2023-01-09T10:30:09Z
dc.date.issued2022-12-26
dc.description.abstractThis study examines the fireside corrosion of FeCrAl, NiCr, NiCrAlY and A625 coatings applied by ‘high velocity oxy fuel’(HVOF) and exposed to simulated biomass firing conditions (gas composition CO2, N2, SO2 and HCl). The coatings and a typical base steel alloy (T92) were exposed to simulated conditions at 600 °C for 1000 h in a laboratory scale furnace. Samples were coated with a potassium chloride deposit. Samples were then cold mounted in a low-shrinkage epoxy resin and then cross-sectioned. Corrosion was assessed by dimensional metrology comparing the coating thickness change of the samples. The cross-sections of the ‘worst’ and ‘best’ coatings were examined. Results show that all but one coating (HVOF NiCr) outperformed the T92 alloy. No coating composition or method was conclusively better. Evidence of Cr depletion as well as the formation of a sulphidation layer have been found in the exposed samples with coatings. The formation of a K2SO4 layer has also been observed on all coated specimens.en_UK
dc.description.sponsorshipInnovate UK: 101167en_UK
dc.identifier.citationPidcock A, Mori S, Sumner J, et al., (2023) High temperature corrosion of HVOF coatings in laboratory-simulated biomass combustion superheater environments, Oxidation of Metals, Volume 99, Issue 1-2, February 2023, pp. 101–115en_UK
dc.identifier.eissn1573-4889
dc.identifier.issn0030-770X
dc.identifier.urihttps://doi.org/10.1007/s11085-022-10141-3
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/18901
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectMetal coatingsen_UK
dc.subjectMolten saltsen_UK
dc.subjectHigh temperature corrosionen_UK
dc.subjectFireside corrosionen_UK
dc.titleHigh temperature corrosion of HVOF coatings in laboratory-simulated biomass combustion superheater environmentsen_UK
dc.typeArticleen_UK

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