TY - JOUR
T1 - The effect of Cl, Br, and F on high-temperature corrosion of heat-transfer alloys
AU - Eriksson, J. E.
AU - Lehmusto, J.
AU - Dirbeba, M.
AU - Silvander, L.
AU - Lindberg, D.
AU - Hupa, L.
N1 - Funding Information:
This work was conducted within the Academy of Finland project “Initiation and propagation of high-temperature corrosion reactions in complex oxygen-containing environments” (Decision no. 348963). This work was partly supported by the project Clean and efficient utilization of demanding fuels (CLUE 2 ), with support from the industrial partners: ANDRITZ Oy, Valmet Technologies Oy, UPM-Kymmene Oyj, Metsä Fibre Oy, and International Paper Inc., as part of the activities of the Åbo Akademi University Johan Gadolin Process Chemistry Centre.
Publisher Copyright:
© 2023 The Author(s)
PY - 2023/9/15
Y1 - 2023/9/15
N2 - The impact of small alkali halide additions on the melting behavior and corrosivity of a synthetic sulfate deposit at 500, 550, and 600 °C was investigated. Three differently alloyed commercial heat-transfer materials; low-alloyed 10CrMo9-10, stainless AISI 347, and high-alloyed Sanicro 28, were studied. The samples were exposed for 168 h in a tube furnace to a K2SO4 + Na2SO4 mixture containing 0.85 mol% KCl, KBr, or KF. The extent of material degradation was determined by weight loss measurements, while the morphology, thickness, and composition of the formed oxide scale were characterized with SEM-EDS. Additionally, the melting behavior of the mixtures was studied with TG-DTA. It could be concluded that already small amounts of reactive alkali halides in an otherwise inert K2SO4 + Na2SO4 mixture change significantly the corrosion and melting behavior of the mixture.
AB - The impact of small alkali halide additions on the melting behavior and corrosivity of a synthetic sulfate deposit at 500, 550, and 600 °C was investigated. Three differently alloyed commercial heat-transfer materials; low-alloyed 10CrMo9-10, stainless AISI 347, and high-alloyed Sanicro 28, were studied. The samples were exposed for 168 h in a tube furnace to a K2SO4 + Na2SO4 mixture containing 0.85 mol% KCl, KBr, or KF. The extent of material degradation was determined by weight loss measurements, while the morphology, thickness, and composition of the formed oxide scale were characterized with SEM-EDS. Additionally, the melting behavior of the mixtures was studied with TG-DTA. It could be concluded that already small amounts of reactive alkali halides in an otherwise inert K2SO4 + Na2SO4 mixture change significantly the corrosion and melting behavior of the mixture.
KW - Alkali halides
KW - Heat-transfer materials
KW - High-temperature corrosion
KW - Melt formation
KW - Waste combustion
UR - http://www.scopus.com/inward/record.url?scp=85153801521&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2023.128516
DO - 10.1016/j.fuel.2023.128516
M3 - Article
AN - SCOPUS:85153801521
SN - 0016-2361
VL - 348
JO - Fuel
JF - Fuel
M1 - 128516
ER -
