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Laboratory testing to evaluate candidate alloys for superheaters in waste-fired boilers
RISE, Swerea, KIMAB.
DEKRA Industrial AB, Sweden.
Jernkontoret, Sweden.
2016 (English)In: Materials at High Temperature, ISSN 0960-3409, E-ISSN 1878-6413, Vol. 33, no 6, p. 587-595Article in journal (Refereed) Published
Abstract [en]

Two types of laboratory tests were used to evaluate the behaviour of a wide range of steels in chlorinating–sulphidising conditions: high temperature exposure after applying salt by dipping in an aqueous KCl/ZnCl2 solution and salt-bed test in a ZnCl2/NaCl/KCl/CaSO4 salt mixture. The exposures were performed at 500 °C in a gas comprising N2/HCl/SO2/O2/N2. For the alloy group with 20–30 wt-% chromium and 25–65 wt-% nickel, the extrapolated metal loss was below 0.2 mm/year in the salt dip, up to 6 mm/year in the salt-bed test with 10% Cl and up to 20 mm/year in the 20% Cl salt-bed test. The intermediate alloy group showed poorer performance in the salt-bed; Esshete1250 showed also large spallation in the salt dip test. Results were compared with plant-exposed samples. Further refinement of the salt dip test is suggested for material ranking in the superheater region of a waste or biomass-fired incinerator. © 2016 Swerea Kimab.

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2016. Vol. 33, no 6, p. 587-595
Keywords [en]
HCl, High temperature corrosion, Laboratory exposure, Salt exposure, SO2, Superheater corrosion, Potassium compounds, Superheaters, Zinc chloride, Dip tests, High-temperature exposure, Laboratory test, Laboratory testing, Metal loss, Salt mixtures, Waste-fired boilers
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41181DOI: 10.1080/09603409.2016.1196032Scopus ID: 2-s2.0-84978476554OAI: oai:DiVA.org:ri-41181DiVA, id: diva2:1377368
Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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