Corrosion Performance of Fe-Based Alloys in Simulated Oxy-Fuel Environment

Zeng, Zuotao; Natesan, Ken; Cai, Zhonghou; Rink, David L.

doi:10.1007/s11663-016-0796-5

Corrosion Performance of Fe-Based Alloys in Simulated Oxy-Fuel Environment

Journal Article · Thu Sep 15 04:00:00 EDT 2016 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/s11663-016-0796-5· OSTI ID:1391920

Zeng, Zuotao; Natesan, Ken; Cai, Zhonghou; Rink, David L.

The long-term corrosion of Fe-based alloys in simulated oxy-fuel environment at 1023 K (750 A degrees C) was studied. Detailed results are presented on weight change, scale thickness, internal penetration, microstructural characteristics of the corrosion products, and the cracking of scales for the alloys after exposure at 1023 K (750 A degrees C) for up to 3600 hours. An incubation period during which the corrosion rate was low was observed for the alloys. After the incubation period, the corrosion accelerated, and the corrosion process followed linear kinetics. Effects of alloy, CaO-containing ash, and gas composition on the corrosion rate were also studied. In addition, synchrotron nanobeam X-ray analysis was employed to determine the phase and chemical composition of the oxide layers on the alloy surface. Results from these studies are being used to address the long-term corrosion performance of Fe-based alloys in various coal-ash combustion environments and to develop methods to mitigate high-temperature ash corrosion.

Research Organization:: Argonne National Laboratory (ANL)

Sponsoring Organization:: USDOE Office of Fossil Energy

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1391920

Journal Information:: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 1 Vol. 48; ISSN 1073-5615

Publisher:: ASM International

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Ash corrosion
CaO
Fe-based alloys
Oxy-fuel

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