Solar reflector aluminum sheet is a kind of aluminum material specially designed for solar energy collection and reflection. It plays an important role in solar thermal and photovoltaic systems, helping to improve the efficiency and performance of the system. Aluminium sheets for solar reflectors usually has excellent UV resistance and corrosion resistance.
Features of aluminium sheets for solar reflectors:
– Anti-ultraviolet performance:
The aluminum oxide protective layer on the surface of the aluminum sheet can effectively reflect and absorb ultraviolet rays, preventing ultraviolet rays from damaging the aluminum substrate inside the aluminum sheet. In addition, by spraying special coatings such as fluorocarbon paint, the anti-ultraviolet performance of the aluminum sheet can be further improved.
– Corrosion resistance:
Aluminum sheet can form a dense oxide film in the air, which has good corrosion resistance. Some specific aluminum alloy materials, such as 3003 aluminum sheet, have good corrosion resistance. In addition, the corrosion resistance of aluminum sheet can be further improved by surface treatment methods such as anodizing, painting, and laminating.
Common materials of aluminum sheets for solar reflectors:
– 3003 aluminum alloy sheet: It belongs to Al-Mn alloy aluminum sheet. This series of aluminum alloys contains manganese and has good corrosion resistance and formability. Suitable for use in environments with direct sunlight and has good UV resistance.
– 5052 aluminum alloy plate: It belongs to the Al-Mg alloy aluminum plate, and the magnesium content is between 2.2% and 2.8%. It has good corrosion resistance, oxidation resistance and fatigue resistance, higher strength than 1060 aluminum sheet, and good processing performance. It is often used in the production of solar reflectors with high requirements for corrosion resistance and strength.
– 6061 aluminum alloy plate: The main alloying elements are magnesium and silicon. It has medium strength, good corrosion resistance and processability. After heat treatment and cold processing, it can obtain higher strength. It can be processed into the required specifications through sawing, drilling, punching, folding and other processes. It is suitable for making solar reflectors of various shapes.
Surface treatment method
– Anodizing treatment: The aluminum sheet is used as an anode and placed in a specific electrolyte for electrolysis to form a layer of aluminum oxide film on its surface. This oxide film can not only improve the corrosion resistance, wear resistance and hardness of the aluminum sheet, but also enhance its UV resistance, making it not easy to fade and age in long-term use in outdoor environments.
– Fluorocarbon spraying treatment: Fluorocarbon coating has excellent weather resistance, corrosion resistance and UV resistance. Fluorocarbon coating is evenly coated on the surface of aluminum sheet through spraying process to form a solid protective film, which can effectively prevent ultraviolet damage to aluminum sheet, and can resist the erosion of corrosive media such as acid rain and salt spray, and maintain the gloss and color stability of aluminum sheet surface.
– Silver plating treatment: Plating a layer of silver on the surface of aluminum sheet can significantly improve the reflectivity of aluminum sheet, making it more suitable as a solar reflector material. At the same time, the silver layer also has certain corrosion resistance, which can protect the aluminum sheet substrate from erosion by the external environment.
Application field of aluminium sheets for solar reflectors:
– Solar photovoltaic power generation:
In solar photovoltaic power station, reflectors used to make photovoltaic panels reflect sunlight onto photovoltaic panels, improve the lighting efficiency of photovoltaic panels, and increase power generation.
– Solar thermal utilization:
In equipment such as solar water heaters and solar thermal collectors, it is used as a reflector to focus sunlight onto the heat collection components, improve the heat collection efficiency, and enhance the performance of solar water heating systems and solar thermal power generation systems.