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Coatings 2018, 8(2), 71; https://doi.org/10.3390/coatings8020071

Arc-Sprayed Fe-Based Coatings from Cored Wires for Wear and Corrosion Protection in Power Engineering

1
Department of Welding Production Technologies, Ural Federal University, Ekaterinburg 620002, Russia
2
Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620219, Russia
3
Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620049, Russia
4
Laboratory of Materials Science, Tampere University of Technology (TUT), Tampere 33720, Finland
This article is selected from presentations at the 2016 International Thermal Spray Conference and has been expanded from the original presentations.
*
Author to whom correspondence should be addressed.
Received: 17 October 2017 / Revised: 20 January 2018 / Accepted: 29 January 2018 / Published: 13 February 2018
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Abstract

High wear and corrosion of parts lead to an increase in operating costs at thermal power plants. The present paper shows a possible solution to this problem through the arc spraying of protective coatings. Cored wires of the base alloying system Fe-Cr-C were used as a feedstock. Rise of wear- and heat-resistance of the coatings was achieved by additional alloying with Al, B, Ti, and Y. The wear and heat resistance of the coatings were tested via a two-body wear test accompanied by microhardness measurement and the gravimetric method, respectively. A high-temperature corrosion test was performed at 550 °C under KCl salt deposition. The porosity and adhesion strengths of the coatings were also evaluated. The microstructure was investigated with a scanning electron microscope (SEM) unit equipped with an energy dispersive X-ray (EDX) microanalyzer, and the phase composition was assessed by X-ray diffractometry. The test results showed the positive influence of additional alloying with Y on the coating properties. A comparison with commercial boiler materials showed that the coatings have the same level of heat resistance as austenite steels and are an order of magnitude higher than that of pearlite and martensite-ferrite steels. The coatings can be applied to wear- and heat-resistant applications at 20–700 °C. View Full-Text
Keywords: waste-to-energy boilers; arc spraying; cored wire; wear and corrosion resistance; adhesion; coating waste-to-energy boilers; arc spraying; cored wire; wear and corrosion resistance; adhesion; coating
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yury, K.; Filiрpov, M.; Makarov, A.; Malygina, I.; Soboleva, N.; Fantozzi, D.; Andrea, M.; Koivuluoto, H.; Vuoristo, P. Arc-Sprayed Fe-Based Coatings from Cored Wires for Wear and Corrosion Protection in Power Engineering. Coatings 2018, 8, 71.

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