TY - JOUR
T1 - The effect of Cl, Br, and F on high-temperature corrosion of heat-transfer alloys
AU - Eriksson, Jan-Erik
AU - Lehmusto, Juho
AU - Dirbeba, Meheretu Jaleta
AU - Silvander, Linus
AU - Lindberg, Daniel
AU - Hupa, Leena
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 K
2SO
4 + Na
2SO
4 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 K
2SO
4 + Na
2SO
4 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 K
2SO
4 + Na
2SO
4 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 K
2SO
4 + Na
2SO
4 mixture change significantly the corrosion and melting behavior of the mixture.
KW - Waste combustion
KW - high-temperature corrosion
KW - alkali halides
KW - Melt formation
KW - Heat-transfer materials
U2 - 10.1016/j.fuel.2023.128516
DO - 10.1016/j.fuel.2023.128516
M3 - Article
SN - 0016-2361
VL - 348
JO - Fuel
JF - Fuel
M1 - 128516
ER -