NDLI: Complementary Methods for the Characterization of Corrosion Products on a Plant-Exposed Superheater Tube

Content Provider	Springer Nature Link
Author	Okoro, Sunday Chukwudi Niessen, Frank Villa, Matteo Apel, Daniel Montgomery, Melanie Frandsen, Flemming Jappe Pantleon, Karen
Copyright Year	2016
Abstract	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)$_{2}$O$_{3}$ and FeCr$_{2}$O$_{4}$. 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.
Starting Page	22
Ending Page	35
Page Count	14
File Format	PDF
ISSN	21929262
Journal	Metallography, Microstructure, and Analysis
Volume Number	6
Issue Number	1
e-ISSN	21929270
Language	English
Publisher	Springer US
Publisher Date	2016-12-28
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stainless steel (Synchrotron) X-ray diffraction SEM High-temperature corrosion Chlorination Spinel Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys

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