Experimental investigations on the chlorine-induced corrosion of HVOF thermal sprayed Stellite-6 and NiAl coatings with fluidised bed biomass/anthracite combustion systems

Hetian Chi; Miguel A Pans; Mingwen Bai; Chenggong Sun; Tanvir Hussain; Wei Sun; Yuge Yao; Junfu Lyu; Hao Liu

doi:10.1016/j.fuel.2020.119607

Experimental investigations on the chlorine-induced corrosion of HVOF thermal sprayed Stellite-6 and NiAl coatings with fluidised bed biomass/anthracite combustion systems

Hetian Chi, Miguel A Pans, Mingwen Bai, Chenggong Sun, Tanvir Hussain, Wei Sun, Yuge Yao, Junfu Lyu, Hao Liu

Research output: Contribution to journal › Article › peer-review

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Abstract

Stellite-6 (Co-based) and NiAl coatings (Ni-based) were deposited via HVOF spraying onto 304 stainless steels and tested in a 20 kWth biomass fired bubbling fluidised bed (BFB) combustor for 20 h and an industrial scale anthracite fired CFB boiler for 1630 h. Stellite-6 showed excellent corrosion resistance in both fluidised bed combustion systems because of the formation of the outermost Cr2O3 layer and the spinel CoCr2O4 beneath, whereas NiAl coatings’ anti-corrosion performance was significantly depleted due to the chlorine attack, and the resultant formation of Al2O3 layer at the coating/substrate interface finally led to coating spallation in both systems.

Original language	English
Article number	119607
Number of pages	13
Journal	Fuel
Volume	288
Early online date	19 Nov 2020
DOIs	https://doi.org/10.1016/j.fuel.2020.119607
Publication status	Published - 15 Mar 2021
Externally published	Yes

Bibliographical note

2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

Funder

UK Engineering and Physical Sciences Research Council [grant number EP/M01536X/1]

Keywords

Bubbling fluidised bed (BFB)
Circulating fluidised bed (CFB)
High-temperature corrosion
High-velocity oxy fuel (HVOF)
NiAl
Stellite-6

ASJC Scopus subject areas

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

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10.1016/j.fuel.2020.119607Licence: CC BY

PublishedFinal published version, 18.9 MBLicence: CC BY

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Experimental investigations on the chlorine-induced corrosion of HVOF thermal sprayed Stellite-6 and NiAl coatings with fluidised bed biomass/anthracite combustion systems. / Chi, Hetian; Pans, Miguel A; Bai, Mingwen; Sun, Chenggong; Hussain, Tanvir; Sun, Wei; Yao, Yuge; Lyu, Junfu; Liu, Hao.

In: Fuel, Vol. 288, 119607, 15.03.2021.

Research output: Contribution to journal › Article › peer-review

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abstract = "Stellite-6 (Co-based) and NiAl coatings (Ni-based) were deposited via HVOF spraying onto 304 stainless steels and tested in a 20 kWth biomass fired bubbling fluidised bed (BFB) combustor for 20 h and an industrial scale anthracite fired CFB boiler for 1630 h. Stellite-6 showed excellent corrosion resistance in both fluidised bed combustion systems because of the formation of the outermost Cr2O3 layer and the spinel CoCr2O4 beneath, whereas NiAl coatings{\textquoteright} anti-corrosion performance was significantly depleted due to the chlorine attack, and the resultant formation of Al2O3 layer at the coating/substrate interface finally led to coating spallation in both systems.",

keywords = "Bubbling fluidised bed (BFB), Circulating fluidised bed (CFB), High-temperature corrosion, High-velocity oxy fuel (HVOF), NiAl, Stellite-6",

author = "Hetian Chi and Pans, {Miguel A} and Mingwen Bai and Chenggong Sun and Tanvir Hussain and Wei Sun and Yuge Yao and Junfu Lyu and Hao Liu",

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AU - Chi, Hetian

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AU - Bai, Mingwen

AU - Sun, Chenggong

AU - Hussain, Tanvir

AU - Sun, Wei

AU - Yao, Yuge

AU - Lyu, Junfu

AU - Liu, Hao

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AB - Stellite-6 (Co-based) and NiAl coatings (Ni-based) were deposited via HVOF spraying onto 304 stainless steels and tested in a 20 kWth biomass fired bubbling fluidised bed (BFB) combustor for 20 h and an industrial scale anthracite fired CFB boiler for 1630 h. Stellite-6 showed excellent corrosion resistance in both fluidised bed combustion systems because of the formation of the outermost Cr2O3 layer and the spinel CoCr2O4 beneath, whereas NiAl coatings’ anti-corrosion performance was significantly depleted due to the chlorine attack, and the resultant formation of Al2O3 layer at the coating/substrate interface finally led to coating spallation in both systems.

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