BLACK CHROMIA COATINGS ON METAL TUBES FOR THE SOLAR COLLECTORS

1 BROZEK Vlastimil
Co-authors:
1 MASTNY Libor 1 NOVAK Michal 2 VILEMOVA Monika 2 KUBATIK Tomas Frantisek
Institutions:
1 University of Chemistry and Technology Prague, Prague, Czech Republic, EU
2 Institute of Plasma Physics CAS v.v.i. Prague, Czech Republic, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1025-1030
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
76 views / 19 downloads
Abstract

This paper describes the results of the first phase of the study preparation, structure and properties of coatings modification of black chromium oxide on copper, aluminium, iron and zirconium tubes for solar collectors. The coatings are prepared by plasma spraying of liquid chromate method which is known as Liquid precursor plasma spraying. Coatings have the function of an energy trap for thermal radiation wavelengths of 1 µm - 3 µm i.e. in the IR region. At the same time, the coating increases the corrosion resistance of metal substrates. The nanometric structure and thickness of the coating depend of the feeding distance and the concentration of chromate precursors. For the deposition of nanometric splats of melt chromiumIII oxide, a new type of feeder that injects precursors into the water stabilized thermal plasma produced by the WSP® generator has been developed.

Keywords: Solar collector, black chromia, plasma spraying

© 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.

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