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At present, there are two common bracket materials on the market: steel and aluminum alloy. The aluminum alloy is in the passivation zone in the atmospheric environment, and a dense oxide film is formed on the surface, which prevents the surface of the active aluminum substrate from contacting the surrounding atmosphere, so it has very good corrosion resistance, and the corrosion rate increases with time. and decrease. Under ordinary conditions (C1-C4 environment), the thickness of 80μm galvanized steel can be guaranteed to be used for more than 20 years, but in high humidity industrial areas or high salinity seashores or even temperate seawater, the corrosion rate is accelerated, and the amount of galvanizing needs 100μm, above and require annual regular maintenance. It can be deduced from this that aluminum alloys are far superior to steel in the corrosion resistance of solar mounts.
There are many surface treatment methods for aluminum alloy profile photovoltaic brackets, such as anodizing, chemical polishing, fluorocarbon spraying, electrophoretic painting, etc., which are beautiful in appearance and strong adaptability. Steel is generally hot-dip galvanized, surface spraying, paint coating and other methods. The appearance is worse than that of aluminum alloy profiles. Therefore, in terms of appearance, the aluminum alloy photovoltaic bracket is also better. Aluminum alloy profile photovoltaic brackets are generally processed by extrusion, casting, bending, stamping and other methods. Extrusion production is the current mainstream production method. By opening the extrusion die, profiles of any arbitrary cross-section can be produced, and the production speed is relatively fast.
Steel photovoltaic brackets generally use rolling, casting, bending, stamping and other methods. At present, rolling is the mainstream production method for producing cold-formed steel. The section needs to be adjusted by the rolling wheel set, but generally, the machine can only produce similar products after finalization, and the size can be adjusted, but the section shape cannot be changed, such as C-section steel, Z-section steel and other sections. The rolling production method is relatively fixed and the production speed is relatively fast.
Comprehensive performance comparison:
(1) The aluminum alloy profile is light in weight, beautiful in appearance and excellent in corrosion resistance. It is generally used in rooftop power stations and strong corrosive environments that require load-bearing. For example, Baowei color steel plate systems, chemical plant power stations, etc. There will be better results.
(2) The steel has high strength and small deflection and deformation when under load. It is generally used in power stations under ordinary conditions or for components with relatively large forces.
(3) Cost: In general, the basic wind pressure is 0.6kN/m2, the span is less than 2m, and the cost of the aluminum alloy bracket is 1.3-1.5 times that of the steel structure bracket. In the small-span system, (such as the color steel plate roof), the cost difference between the aluminum alloy bracket and the steel structure bracket is relatively small, and the aluminum alloy is much lighter than the steel bracket in terms of weight, so it is very suitable for roof power stations.
From the above analysis, it can be known that the aluminum alloy profile photovoltaic bracket is currently the most popular in the market in terms of comprehensive performance.
Xiamen HQ Mount is a high-tech enterprise dedicated to providing patented technology and efficient services, specializing in the research and development, design, production, sales and service of various photovoltaic mounting system solutions, and always provides customers with the most stable, reliable and cost-effective photovoltaics bracket system solutions. The company has a full range of product design, manufacturing and supply capabilities, including a series of high-tech support products such as solar ground brackets, photovoltaic carports, solar agricultural greenhouses, industrial and commercial solar roof bracket, water floating platforms, and solar household distribution, and has successfully passed TUV, SGS, CE. Certified, always leading the industry in structural design and system performance.
