Journal article
Complementary Methods for the Characterization of Corrosion Products on a Plant-Exposed Superheater Tube
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
Department of Mechanical Engineering, Technical University of Denmark2
Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark3
CHEC Research Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark4
Centre for oil and gas – DTU, Technical University of Denmark5
Helmholtz Centre Berlin for Materials and Energy6
In this work, complex corrosion products on a superheater tube exposed to biomass firing were characterized by the complementary use of energy-dispersive synchrotron diffraction, electron microscopy, and energy-dispersive X-ray spectroscopy. Non-destructive synchrotron diffraction in transmission geometry measuring with a small gauge volume from the sample surface through the corrosion product allowed depth-resolved phase identification and revealed the presence of (Fe,Cr)2O3 and FeCr2O4.
This was supplemented by microstructural and elemental analysis correlating the additional presence of a Ni-rich austenite phase to selective removal of Fe and Cr from the alloy, via a KCl-induced corrosion mechanism. Compositional variations were related to diffraction results and revealed a qualitative influence of the spinel cation concentration on the observed diffraction lines.
| Language: | English |
|---|---|
| Publisher: | Springer US |
| Year: | 2017 |
| Pages: | 22-35 |
| Journal subtitle: | Application and Innovation for Metals, Alloys, and Engineered Materials |
| ISSN: | 21929270 and 21929262 |
| Types: | Journal article |
| DOI: | 10.1007/s13632-016-0325-6 |
| ORCIDs: | Okoro, Sunday Chukwudi , Nießen, Frank , Villa, Matteo , Montgomery, Melanie , Jappe Frandsen, Flemming and Pantleon, Karen |
