Fireside corrosion of heat exchanger materials for advanced solid fuel fired power plants

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dc.contributor.authorMori, Stefano
dc.contributor.authorPidcock, Andy
dc.contributor.authorSumner, Joy
dc.contributor.authorSimms, Nigel
dc.contributor.authorOakey, John
dc.date.accessioned2022-01-12T14:38:29Z
dc.date.available2022-01-12T14:38:29Z
dc.date.issued2021-12-18
dc.description.abstractTo address the challenge of climate change, future energy systems need to have reduced greenhouse gas emissions and increased efficiencies. For solid fuel fired combustion plants, one route towards achieving this is to increase the system’s steam temperatures and pressures. Another route is to co-fire renewable fuels (such as biomass) with coals. Fireside corrosion performance of two candidate superheater/reheater alloys has been characterised at higher heat exchanger surface temperature. Samples of the alloys (a stainless steel, Sanicro 25 and a nickel-based alloy, IN740) were exposed in fireside corrosion tests at 650 °C, 700 °C and 750 °C, in controlled atmosphere furnaces using the ‘deposit recoat’ test method to simulate superheater/reheater exposure for 1000 h. After exposure, the samples were analysed using dimensional metrology to determine the extent and distributions of corrosion damage in terms of surface recession and internal damage. At 650 °C, the stainless steel and nickel-based alloy performed similarly, while at 700 °C and above, the median damage to the steel was at least 3 times greater than for the nickel-based alloy. Optical and electronic microscopy studies were used to study samples’ damage morphologies after exposure. Intergranular damage and pits were found in sample cross sections, while chromium depletion was found in areas with internal damage. For high-temperature applications, the higher cost of the nickel-based alloy could be offset by the longer life they would allow in plant with higher operating temperatures.en_UK
dc.description.sponsorshipEuropean Union funding RFCS-2015/709954en_UK
dc.identifier.citationMori S, Pidcock A, Sumner J, et al., (2022) Fireside corrosion of heat exchanger materials for advanced solid fuel fired power plants, Oxidation of Metals, Volume 97, Issue 3-4, April 2022, pp. 281–306en_UK
dc.identifier.eissn1573-4889
dc.identifier.issn0030-770X
dc.identifier.urihttps://doi.org/10.1007/s11085-021-10094-z
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17403
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectFireside corrosionen_UK
dc.subjectNickel-based alloyen_UK
dc.subjectStainless steelen_UK
dc.subjectDimensional metrologyen_UK
dc.subjectInternal damageen_UK
dc.subjectSurface recessionen_UK
dc.titleFireside corrosion of heat exchanger materials for advanced solid fuel fired power plantsen_UK
dc.typeArticleen_UK

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