Esmaeil Sadeghimeresht
Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings
Sadeghimeresht, Esmaeil; Reddy, Liam; Hussain, Tanvir; Huhtakangas, Matti; Markocsan, Nicolaie; Joshi, Shrikant
Authors
Liam Reddy
TANVIR HUSSAIN TANVIR.HUSSAIN@NOTTINGHAM.AC.UK
Professor of Coatings and Surface Engineering
Matti Huhtakangas
Nicolaie Markocsan
Shrikant Joshi
Abstract
The oxidation performance of NiCrAlY and NiCrMo coatings thermally sprayed by high velocity air-fuel (HVAF) technique has been investigated in a chloridizing-oxidizing environment, with and without a KCl deposit, at 600 °C for up to 168 h. Both coatings protected the substrate in the absence of KCl due to formation of a dense Cr-rich oxide scale. In the presence of KCl, Cl−/Cl2 diffused through a non-protective and porous NiCr2O4 scale formed on NiCrAlY, leading to formation of volatile CrCl3. On the other hand, Mo in NiCrMo stimulated the formation of a more protective Cr-rich oxide scale which increased the corrosion resistance by reducing Cl−/Cl2 diffusion.
Citation
Sadeghimeresht, E., Reddy, L., Hussain, T., Huhtakangas, M., Markocsan, N., & Joshi, S. (2018). Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings. Materials and Design, 148, https://doi.org/10.1016/j.matdes.2018.03.048
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 20, 2018 |
Online Publication Date | Mar 22, 2018 |
Publication Date | Jun 15, 2018 |
Deposit Date | Apr 9, 2018 |
Publicly Available Date | Mar 23, 2019 |
Journal | Materials & Design |
Print ISSN | 0261-3069 |
Electronic ISSN | 0264-1275 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 148 |
DOI | https://doi.org/10.1016/j.matdes.2018.03.048 |
Keywords | Thermal spray coating; NiCrAlYNiCrMo; High-velocity air fuel (HVAF); Biomass-/waste-fired boiler; Fireside corrosion |
Public URL | https://nottingham-repository.worktribe.com/output/938748 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0264127518302338 |
Contract Date | Apr 9, 2018 |
Files
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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