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Exposure of FeCrAl Overlay Welds on Superheater Tubes: Influence of Local Environment on Degradation
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0003-3374-6282
École d’Ingénieurs de Limoges, Université de Limoges (FRA).
E.ON Va¨rme Sverige AB, Norrköping.
Kanthal, Hallstahammar.
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2022 (English)In: Journal of Failure Analysis and Prevention, ISSN 1547-7029, E-ISSN 1864-1245, Vol. 22, no 1, p. 400-408Article in journal (Refereed) Published
Abstract [en]

Two experimental FeCrAl alloy overlay welds on tube shields were exposed in the superheater of a full-size waste fired boiler for 6 months. The tube shields were in different tube lines and positions within the superheater chamber to investigate possible heterogeneities in the exposure environment. The visual inspection of the exposed tube shields and the corrosion-erosion rates calculated from the analysis of cross-sections showed that the mid-length roof location experienced the most aggressive environment. The compositional differences between the two experimental alloys were not found to be determinant in their performance under these specific exposure conditions. It was concluded that erosion had a decisive influence on the results. The identification of local differences within the superheater chamber is important when deciding on the material selection for the different areas and locations to be protected. The output of this study is therefore interesting for further design consideration of superheaters as well as for future planning of exposures.

Place, publisher, year, edition, pages
Springer, 2022. Vol. 22, no 1, p. 400-408
Keywords [en]
Boiler, Superheater, Overlay welding, FeCrAl alloys
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-18080DOI: 10.1007/s11668-022-01337-5ISI: 000742255500001Scopus ID: 2-s2.0-85123084204OAI: oai:DiVA.org:hv-18080DiVA, id: diva2:1631699
Available from: 2022-01-25 Created: 2022-01-25 Last updated: 2024-04-12Bibliographically approved

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Valiente Bermejo, María AsunciónHurtig, KjellStridh, Lars-ErikKarlsson, L.

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