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Influence of KCl and HCl on a Laser Clad FeCrAl Alloy: In-Situ SEM and Controlled Environment High Temperature Corrosion

Reddy, L.; Sattari, M.; Davis, C.J.; Shipway, P.H.; Halvarsson, M.; Hussain, T.

Authors

L. Reddy

M. Sattari

C.J. Davis

M. Halvarsson



Abstract

This study investigated the effects of HCl and KCl on a laser-clad FeCrAl coating at 450 °C in an in-situ ESEM followed by a furnace exposure. In all in-situ TEM cross-sections, three major phases were identified: an iron rich oxide, an iron-chromium mixed oxide and an aluminium enriched layer. HCl allowed chlorine based corrosion to occur which suggests interaction from its gas phase. EDX of the regions around KCl crystals showed a decrease in chromium which is an indication of chlorine selectively removing chromium. Moreover, the mass gain in HCl with KCl was significantly lower than that observed in air with KCl.

Citation

Reddy, L., Sattari, M., Davis, C., Shipway, P., Halvarsson, M., & Hussain, T. (2019). Influence of KCl and HCl on a Laser Clad FeCrAl Alloy: In-Situ SEM and Controlled Environment High Temperature Corrosion. Corrosion Science, 158, 1-10. https://doi.org/10.1016/j.corsci.2019.07.003

Journal Article Type Article
Acceptance Date Jul 5, 2019
Online Publication Date Jul 9, 2019
Publication Date Sep 1, 2019
Deposit Date Jul 17, 2019
Publicly Available Date Jul 17, 2019
Journal Corrosion Science
Print ISSN 0010-938X
Electronic ISSN 1879-0496
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 158
Article Number 108076
Pages 1-10
DOI https://doi.org/10.1016/j.corsci.2019.07.003
Keywords In-situ SEM; Aluminium; High Temperature Corrosion; Molten Salts (A)
Public URL https://nottingham-repository.worktribe.com/output/2314826
Publisher URL https://www.sciencedirect.com/science/article/pii/S0010938X18320079

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