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Hot corrosion of two nickel-base superalloys under alkali sulfate deposition conditions
RISE, Swerea, Swerea KIMAB.
Siemens Industrial Turbomachinery.
RISE, Swerea, Swerea KIMAB.
2009 (English)In: Materials at High Temperature, ISSN 0960-3409, E-ISSN 1878-6413, Vol. 26, no 3, p. 251-257Article in journal (Refereed)
Abstract [en]

The single crystal MD2 (Ni-8Cr-5Al-5Co-2Mo-8W-6Ta-1Ti) and the polycrystalline Inconel 792 (Ni-13Cr-3Al-9Co-2Mo-4W-4Ta-4Ti) were exposed at 850 and 900°C in an severely sulfidising environment comprising synthetic air with 8% water vapour and 2000 ppm SO2, and a deposit of 20mol% Na2SO4 + 80mol% K2SO4 applied every 160 hours. Results were evaluated in terms of mass change, which indicated the existence of an incubation time before the onset of extensive attack, and post-test metallography to evaluate metal loss. Metallographic studies are presented showing the complex external oxide scale formation and internal oxidation and sulfidation. © 2009 Science Reviews 2000 Ltd.

Place, publisher, year, edition, pages
2009. Vol. 26, no 3, p. 251-257
Keywords [en]
Alkali sulfate deposition conditions, Hot corrosion, Nickel-based superalloy
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12879DOI: 10.3184/096034009X462232Scopus ID: 2-s2.0-72349096906OAI: oai:DiVA.org:ri-12879DiVA, id: diva2:973072
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2017-11-21Bibliographically approved

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