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Long-term Hot Corrosion Behavior of Boiler Tube Alloys in Waste-to-Energy Plants Liu, Jing; Dyson, Devy; Asselin, Edouard
Abstract
Accelerated corrosion of candidate alloys was induced by metal chlorides/sulfates at 500°C. Results suggest that the corrosivity of the studied metal chlorides increases in the order CaCl₂ < NaCl < KCl < ZnCl₂ < PbCl₂ < FeCl₂. Mechanisms to explain the different impacts of chlorides were proposed. It is believed that materials exposed to chloride salts corrode through vicious cycles, in which a shorter path of the cycle leads to a higher corrosion rate. Experimental results confirmed that FeCl₂, with the shortest path of the corresponding vicious cycle, resulted in the highest corrosion rate. It is also confirmed that the sulfates of Zn and Pb are less corrosive than their chlorides for the alloys tested. A kinetic study on the hot corrosion of T22, Esshete 1250 and Sanicro 28 was carried out under simulated waste-to-energy (WTE) ashes at 500°C for 1000 h. Results from the kinetic study show that T22, Esshete 1250, and Sanicro 28 exhibited comparable performance for short-term exposure; however, the degradation thickness presented a clear trend after the 1000 h exposures in terms of decreasing resistance to corrosion: T22 > Esshete 1250 > Sanicro 28. EDX maps confirmed the role of Ni/Cr for slowing the corrosion kinetics of these three alloys.
Item Metadata
Title |
Long-term Hot Corrosion Behavior of Boiler Tube Alloys in Waste-to-Energy Plants
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Creator | |
Publisher |
Springer
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Date Issued |
2016-05-20
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Description |
Accelerated corrosion of candidate alloys was induced by metal chlorides/sulfates at
500°C. Results suggest that the corrosivity of the studied metal chlorides increases in
the order CaCl₂ < NaCl < KCl < ZnCl₂ < PbCl₂ < FeCl₂. Mechanisms to explain the
different impacts of chlorides were proposed. It is believed that materials exposed to
chloride salts corrode through vicious cycles, in which a shorter path of the cycle leads
to a higher corrosion rate. Experimental results confirmed that FeCl₂, with the shortest
path of the corresponding vicious cycle, resulted in the highest corrosion rate. It is also
confirmed that the sulfates of Zn and Pb are less corrosive than their chlorides for the
alloys tested. A kinetic study on the hot corrosion of T22, Esshete 1250 and Sanicro 28
was carried out under simulated waste-to-energy (WTE) ashes at 500°C for 1000 h.
Results from the kinetic study show that T22, Esshete 1250, and Sanicro 28 exhibited
comparable performance for short-term exposure; however, the degradation thickness
presented a clear trend after the 1000 h exposures in terms of decreasing resistance to
corrosion: T22 > Esshete 1250 > Sanicro 28. EDX maps confirmed the role of Ni/Cr for
slowing the corrosion kinetics of these three alloys.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2021-06-17
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0398431
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URI | |
Affiliation | |
Citation |
Liu, J., Dyson, D. & Asselin, E. Long-term Hot Corrosion Behavior of Boiler Tube Alloys in Waste-to-Energy Plants. Oxid Met 86, 135–149 (2016).
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Publisher DOI |
10.1007/s11085-016-9627-y
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International