Comparative hot corrosion performance of APS and Detonation sprayed CoCrAlY, NiCoCrAlY and NiCr coatings on T91 boiler steel

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dc.contributor.authorSundaresan, C.
dc.contributor.authorRajasekaran, B.
dc.contributor.authorVaralakshmi, S.
dc.contributor.authorSanthy, K.
dc.contributor.authorRao, D.S.
dc.contributor.authorGovindarajan, G.
dc.date.accessioned2026-02-05T09:26:53Z
dc.date.issued2021
dc.description.abstractHot corrosion performance of Atmospheric Plasma Spray (APS) and Detonation spray (DSC) CoCrAlY, NiCoCrAlY, and NiCr coatings on T91 steel were investigated at 650 °C for 100 cycles under Na<inf>2</inf>SO<inf>4</inf>-K<inf>2</inf>SO<inf>4</inf>-Fe<inf>2</inf>O<inf>3</inf> mixed salt deposit in ambient air. The hot corrosion resistance of DSC coatings was found to be superior to their APS counterparts. Chromia and spinel oxides provided excellent corrosion resistance while no ?-Al<inf>2</inf>O<inf>3</inf> was observed. DSC NiCr and APS NiCoCrAlY offered the most and the least corrosion resistance, respectively. DFT calculation was performed to validate the thermodynamic stability of each oxide and identify the precise oxide formation. © 2021 Elsevier Ltd
dc.identifier.citationCorrosion Science, 2021, 189, , pp. -
dc.identifier.issn0010938X
dc.identifier.urihttps://doi.org/10.1016/j.corsci.2021.109556
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23128
dc.publisherElsevier Ltd
dc.subjectAlumina
dc.subjectAluminum oxide
dc.subjectBinary alloys
dc.subjectChromium steel
dc.subjectCobalt alloys
dc.subjectCorrosion resistance
dc.subjectCorrosion resistant coatings
dc.subjectDetonation
dc.subjectHematite
dc.subjectHigh temperature corrosion
dc.subjectNickel steel
dc.subjectPlasma spraying
dc.subjectPotash
dc.subjectSodium sulfate
dc.subjectSprayed coatings
dc.subjectSteel corrosion
dc.subjectThermodynamic stability
dc.subjectA cobalt
dc.subjectA metal coating
dc.subjectA nickel
dc.subjectAtmospheric plasma spray
dc.subjectB SEM
dc.subjectB XRD
dc.subjectC hot corrosion
dc.subjectCorrosion performance
dc.subjectHot corrosion
dc.subjectNiCoCrAlY coatings
dc.subjectChromium alloys
dc.titleComparative hot corrosion performance of APS and Detonation sprayed CoCrAlY, NiCoCrAlY and NiCr coatings on T91 boiler steel

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