Comparative Evaluation of Hot Corrosion Resistance of 83WC–17CO and 86WC–10CO–4Cr Coatings on Some Boiler Steels in Actual Boiler in Thermal Power Plant

Comparative Evaluation of Hot Corrosion Resistance of 83WC–17CO and 86WC–10CO–4Cr Coatings... This research work was focused on the performance of HVOF-sprayed 83WC–17CO and 86WC–10CO–4Cr coatings on boiler steel alloys ASME SA213 T22 and ASME SA213 T91 in a coal-fired boiler environment. Both coated and bare steel alloys were subjected to cyclic exposures, in the superheater zone of a coal-fired boiler for 10 cycles at 900 °C to compare the effect of the coatings in actual boiler environment. During the study, each cycle consisted of 100-h heating followed by 1-h cooling at ambient conditions and thereafter thermogravimetric method was used to establish the kinetics of corrosion. Corrosion products were examined by x-ray diffraction, scanning electron microscopy/energy-dispersive spectroscopy techniques. The hot corrosion resistance of both the coatings 83WC–17CO and 86WC–10CO–4Cr coating was found better on ASME SA213 T22, whereas 86WC–10CO–4Cr coating showed the higher corrosion resistance on ASME SA213 T22 as compared to 83WC–17CO coating. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Metallography, Microstructure, and Analysis Springer Journals

Comparative Evaluation of Hot Corrosion Resistance of 83WC–17CO and 86WC–10CO–4Cr Coatings on Some Boiler Steels in Actual Boiler in Thermal Power Plant

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC and ASM International
Subject
Materials Science; Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology
ISSN
2192-9262
eISSN
2192-9270
D.O.I.
10.1007/s13632-017-0392-3
Publisher site
See Article on Publisher Site

Abstract

This research work was focused on the performance of HVOF-sprayed 83WC–17CO and 86WC–10CO–4Cr coatings on boiler steel alloys ASME SA213 T22 and ASME SA213 T91 in a coal-fired boiler environment. Both coated and bare steel alloys were subjected to cyclic exposures, in the superheater zone of a coal-fired boiler for 10 cycles at 900 °C to compare the effect of the coatings in actual boiler environment. During the study, each cycle consisted of 100-h heating followed by 1-h cooling at ambient conditions and thereafter thermogravimetric method was used to establish the kinetics of corrosion. Corrosion products were examined by x-ray diffraction, scanning electron microscopy/energy-dispersive spectroscopy techniques. The hot corrosion resistance of both the coatings 83WC–17CO and 86WC–10CO–4Cr coating was found better on ASME SA213 T22, whereas 86WC–10CO–4Cr coating showed the higher corrosion resistance on ASME SA213 T22 as compared to 83WC–17CO coating.

Journal

Metallography, Microstructure, and AnalysisSpringer Journals

Published: Oct 10, 2017

References

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