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Effect of sewage sludge addition on initial corrosion of 16Mo3 and 310S when exposed in a used wood fired boiler
RISE, Swerea, KIMAB.ORCID iD: 0000-0003-3494-0554
KTH Royal Institute of Technology, Sweden.
RISE, Swerea, KIMAB.ORCID iD: 0000-0002-2339-9443
KTH Royal Institute of Technology, Sweden; Vattenfall AB, Sweden.
2016 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 67, no 7, p. 683-692Article in journal (Refereed) Published
Abstract [en]

With an expanding use of low quality bio fuels, corrosion problems on water wall tubes are increasing. In this study, the possible corrosion reducing effect when adding digested sewage sludge to the fuel in a used wood (also known as waste or recycled wood) fired furnace has been evaluated. The low alloyed steel 16Mo3 and the stainless steel 310S were exposed for 14.25 h at the furnace wall position when firing only used wood and used wood with sewage sludge additions. The exposures were performed in a bubbling fluidized bed boiler and the metal temperature of the test samples was controlled to 350 °C. Chemical analysis of the deposits and microscopic evaluation of the metallic samples showed reduced amount of alkali metals and chlorine in the deposit together with reduced initial corrosion for both materials when co-firing with digested sewage sludge. In the corrosion process, metal chlorides were formed for both materials when firing only used wood, iron chlorides for the low alloyed steel, and chromium chlorides for the stainless steel. When co-firing with sewage sludge, this behavior was suppressed.

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2016. Vol. 67, no 7, p. 683-692
Keywords [en]
alkali chloride, digested sewage sludge, high temperature corrosion, metal chloride, used wood, Alkali metals, Boilers, Chemical analysis, Chlorine compounds, Corrosion, Deposits, Fluidized beds, Metals, Sewage sludge, Wood, Alkali chlorides, Bubbling fluidized bed boilers, Corrosion problems, High temperature corrosions, Metal chlorides, Microscopic evaluation, Wood fired boilers, Stainless steel
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41234DOI: 10.1002/maco.201508693Scopus ID: 2-s2.0-84990175145OAI: oai:DiVA.org:ri-41234DiVA, id: diva2:1377344
Note

Funding details: 39270-1; Funding details: Vattenfall; Funding text 1: This work is part of a project financed by the Swedish Energy Agency under the grant number 39270-1, and by Vattenfall AB and other member companies of KME Consortium Materials Technology for thermal energy processes. The field exposures and fuel measurements were assisted by Mattias Mattsson, Anna Helgesson, and Carl Nordenskj?ld, at Vattenfall AB. The authors are thankful for the support.

Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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Talus, AnnikaNorling, Rikard

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