Mingwen Bai
Experimental and thermodynamic investigations on the chlorine-induced corrosion of HVOF thermal sprayed NiAl coatings and 304 stainless steels at 700 °C
Bai, Mingwen; Reddy, Liam; Hussain, Tanvir
Authors
Liam Reddy
TANVIR HUSSAIN TANVIR.HUSSAIN@NOTTINGHAM.AC.UK
Professor of Coatings and Surface Engineering
Abstract
Alumina-forming β-NiAl coatings were deposited by high Velocity Oxy-fuel (HVOF) thermal spray onto 304 stainless steels for protection against chlorine induced corrosion in a biomass-fired boiler. The corrosion test was conducted in a synthetic gas containing 500 ppm HCl with 10 wt% KCl ash deposit at 700 °C for 250 hours. Severe corrosion was observed with the fast growing alumina at the coating/substrate interface initiating from sample edges. Possible corrosion mechanism was proposed: as supplied by HCl/KCl, the formation of volatile chlorine/chloride acted as a catalyst and promoted the growth of alumina at relatively lower application temperatures (
Citation
Bai, M., Reddy, L., & Hussain, T. (2018). Experimental and thermodynamic investigations on the chlorine-induced corrosion of HVOF thermal sprayed NiAl coatings and 304 stainless steels at 700 °C. Corrosion Science, 135, https://doi.org/10.1016/j.corsci.2018.02.047
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 20, 2018 |
Online Publication Date | Feb 21, 2018 |
Publication Date | May 1, 2018 |
Deposit Date | Feb 27, 2018 |
Publicly Available Date | Feb 27, 2018 |
Journal | Corrosion Science |
Print ISSN | 0010-938X |
Electronic ISSN | 1879-0496 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 135 |
DOI | https://doi.org/10.1016/j.corsci.2018.02.047 |
Keywords | Nickel Aluminide; Stainless Steel; HVOF; Biomass; Chlorine; Thermodynamic |
Public URL | https://nottingham-repository.worktribe.com/output/930542 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0010938X1731644X |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
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