Authors
Zlotnikov A.I. – Engineer, Department of Oil and Gas Exploration and Hydro-Pneumoautomatics, Gomel State Technical University, Gomel, Republic of Belarus,zlotnikov@gstu.by
Zlotnikov I.I. – Candidate of Technical Sciences, Associate Professor, Department of Physics and Electrical Engineering, Gomel State Technical University, Gomel, Republic of Belarus, zlotnikov@gstu.by
Annotation
The article is devoted to the development of light-absorbing coatings based on the technology of microarc oxidation of solar collectors. The purpose of the work is the development of coatings obtained on the surface of aluminum alloys and the study of the possibility of their use as light-absorbing coatings for solar collectors. It is noted that the task of developing light-absorbing coatings is very relevant and has a variety of specificapplications. Firstly, this is the problem of reducing the scattered light background in optical devices and display devices of modern vehicles. Secondly, the development of effective light-absorbing coatings for converters of solar energy into thermal energy. The process of microarc oxidation of aluminum alloys was carried out in a symmetrical anode-cathode mode using alternating current of a sinusoidal voltage of a standard frequency. This allows the use of normal industrial voltage without the need for frequency converters, which simplifies the process. The base electrolyte was a silicate-alkaline solution containing potassium hydroxide, to which ammonium molybdate was added. The developed coating has a high absorption capacity and is highly resistant to aggressive media. This well protects the collector’s metal absorber from mechanical damage. The resulting coatings can be applied directly to the absorber surface or to aluminum foil sheets. It is concluded that the second method is more promising, since prefabricated coated foil sheets can be glued to the desired areas of absorbers of any design and size.
Keywords
light-absorbing coating, solar collectors, microarc oxidation technology, absorber, anodic oxidation of metals
References
- Suminov I.V. Microarc oxidation (theory, technology, equipment) / I.V. Suminov [i dr.]. – M.: ECOMET, 2005. – 368 p.
- Kharchenko N.V. Individual solar installations / N.V. Kharchenko. – M.: Energoatomizdat. – 1991. – 208 p.
- Electrolyte for obtaining a black ceramic coating on valve metals and their alloys, a method for its preparation and a coating obtained by this method: patent 2285066 RF / A.I. Mamaev, E.V. Khokhryakov, P.I. Butyagin. – Published. 10.10.2006.
Publication date
2023-10-28