Why is zinc-aluminum-magnesium more suitable for solar mount system?
Publish Time：2022-11-01
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About solar mount system
The solar bracket is the "skeleton" that supports the photovoltaic modules. Its performance directly affects the operation stability, power generation efficiency and investment income of the photovoltaic power station, and plays an important role in the construction of the photovoltaic power station. Solar brackets are special functional brackets used to install, support and fix photovoltaic modules. According to whether they can follow the sun to rotate, they can be divided into fixed brackets and tracking brackets.
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1. Fixed bracket
The fixed bracket has a simple structure, good stability, and low initial investment and maintenance costs. With its excellent stability and low initial investment cost, the fixed bracket occupies a large share in the solar bracket market and is currently the mainstream type.
2. Tracking solar mount
The tracking bracket can follow the sunlight to rotate in real time, which can not only improve the power generation gain, but also smooth the output curve. The combination of the tracking bracket and the double glass can reduce the angle between the module and the direct sunlight, obtain more solar radiation, achieve higher power generation, and effectively improve the power generation efficiency. Photovoltaic tracking brackets can generally bring a 15%-20% increase in power generation to photovoltaic power plants, but power stations using tracking brackets need to increase a certain amount of upfront investment cost, and need to bear certain device operation risks and post-maintenance costs.
The focus of solar mounts on raw materials
The photovoltaic system needs to run smoothly in harsh natural environment for more than 25 years, which means that the solar support needs to have strong mechanical properties such as wind pressure resistance, snow pressure resistance, earthquake resistance, corrosion resistance, etc. It can operate normally in various harsh environments.
In addition, due to the installation and fixation of the solar support and other components, the raw materials need to be slit and punched.
Therefore, the previous practice for a long time was to carry out hot-dip galvanizing after processing the steel plate. The advantage of this method is that the cut and punched parts can be covered by hot-dip galvanizing after processing, but the disadvantage is the post-processing process. And the supporting transportation, storage and other links are more, the cost is higher, it is not environmentally friendly and there is no quality assurance. With the development of the photovoltaic industry, the market also urgently needs a product solution that can replace hot-dip galvanizing.
Advantages and characteristics of zinc aluminum magnesium
1. Introduction of zinc-aluminum-magnesium products:
The zinc-aluminum-magnesium coated steel sheet refers to a coated steel sheet with a certain amount of Al and Mg added to the existing hot-dip galvanized coating or a certain amount of Mg element added to the hot-dip galvanized coating. Features of cutting edge protection performance.
The published results of laboratory accelerated experiments and outdoor exposure experiments show that increasing the content of Al and Mg within a certain range will improve the corrosion resistance several times to ten times.
Another major advantage of adding Mg to the coating is that the corrosion resistance of the cut edge of the steel plate is improved, and the Zn-based corrosion products containing Mg will cover the surface of the cut, thereby protecting the cut.
2. Features of zinc-aluminum-magnesium products:
(1) High corrosion resistance: The magnesium (Mg) component in the coating is beneficial to promote the formation of a very stable and dense protective film, and to generate and maintain a film-like coating on the surface of the coating, thereby exerting excellent corrosion resistance.
(2) Incision protection: The incision part processed by the steel plate is exposed to the air, which is prone to red rust corrosion. However, the alloying elements in the zinc-aluminum-magnesium surface coating form water-soluble ions in the atmospheric corrosion environment, and gradually cover the incision with the flow of the liquid film, forming a stable protective film, covering the red rust at the incision position, significantly improving the incision Corrosion resistance.
(3) Easy stamping: The friction behavior of zinc-aluminum-magnesium coating (ZM) and pure zinc coating (GI) during multiple friction processes was evaluated by a reciprocating friction test machine. The friction coefficient of the zinc-aluminum-magnesium coating is 15% lower than that of the pure zinc coating, and it remains stable during the reciprocating friction process, indicating that the zinc-aluminum-magnesium coating has excellent wear resistance.
3. Compared with the advantages of hot dip galvanizing:
(1) Shorten the process cost: The use of hot-dip galvanized aluminum-magnesium can omit the hot-dip galvanizing and post-treatment processes, as well as supporting transportation, storage and other links, reduce pollutant emissions, improve efficiency, and save costs.
(2) Improvement of corrosion resistance: Under the condition of neutral salt spray test, the plane corrosion resistance of zinc-aluminum-magnesium coating is obviously better than that of hot-dip pure zinc coating.
(3) Increased warranty period: zinc-aluminum-magnesium products can provide more than 30 years of use warranty, which meets the requirements of the photovoltaic industry for more than 25 years.
As the current mainstream application of solar brackets, zinc-aluminum-magnesium panels can be directly processed and used, shortening the processing period of component products, and the project construction period is well controllable. In addition, with its corrosion resistance, wear resistance, coating resistance and good welding processability, it has been widely used in various industries, whether in photovoltaic (construction) industry, automobile manufacturing, animal husbandry or airport. , high-speed rail construction, etc., we can see the figure of zinc-aluminum-magnesium plate.
The solar bracket is the "skeleton" that supports the photovoltaic modules. Its performance directly affects the operation stability, power generation efficiency and investment income of the photovoltaic power station, and plays an important role in the construction of the photovoltaic power station. Solar brackets are special functional brackets used to install, support and fix photovoltaic modules. According to whether they can follow the sun to rotate, they can be divided into fixed brackets and tracking brackets.
The fixed bracket has a simple structure, good stability, and low initial investment and maintenance costs. With its excellent stability and low initial investment cost, the fixed bracket occupies a large share in the solar bracket market and is currently the mainstream type.
2. Tracking solar mount
The tracking bracket can follow the sunlight to rotate in real time, which can not only improve the power generation gain, but also smooth the output curve. The combination of the tracking bracket and the double glass can reduce the angle between the module and the direct sunlight, obtain more solar radiation, achieve higher power generation, and effectively improve the power generation efficiency. Photovoltaic tracking brackets can generally bring a 15%-20% increase in power generation to photovoltaic power plants, but power stations using tracking brackets need to increase a certain amount of upfront investment cost, and need to bear certain device operation risks and post-maintenance costs.
The focus of solar mounts on raw materials
The photovoltaic system needs to run smoothly in harsh natural environment for more than 25 years, which means that the solar support needs to have strong mechanical properties such as wind pressure resistance, snow pressure resistance, earthquake resistance, corrosion resistance, etc. It can operate normally in various harsh environments.
In addition, due to the installation and fixation of the solar support and other components, the raw materials need to be slit and punched.
Therefore, the previous practice for a long time was to carry out hot-dip galvanizing after processing the steel plate. The advantage of this method is that the cut and punched parts can be covered by hot-dip galvanizing after processing, but the disadvantage is the post-processing process. And the supporting transportation, storage and other links are more, the cost is higher, it is not environmentally friendly and there is no quality assurance. With the development of the photovoltaic industry, the market also urgently needs a product solution that can replace hot-dip galvanizing.
Advantages and characteristics of zinc aluminum magnesium
1. Introduction of zinc-aluminum-magnesium products:
The zinc-aluminum-magnesium coated steel sheet refers to a coated steel sheet with a certain amount of Al and Mg added to the existing hot-dip galvanized coating or a certain amount of Mg element added to the hot-dip galvanized coating. Features of cutting edge protection performance.
The published results of laboratory accelerated experiments and outdoor exposure experiments show that increasing the content of Al and Mg within a certain range will improve the corrosion resistance several times to ten times.
Another major advantage of adding Mg to the coating is that the corrosion resistance of the cut edge of the steel plate is improved, and the Zn-based corrosion products containing Mg will cover the surface of the cut, thereby protecting the cut.
2. Features of zinc-aluminum-magnesium products:
(1) High corrosion resistance: The magnesium (Mg) component in the coating is beneficial to promote the formation of a very stable and dense protective film, and to generate and maintain a film-like coating on the surface of the coating, thereby exerting excellent corrosion resistance.
(2) Incision protection: The incision part processed by the steel plate is exposed to the air, which is prone to red rust corrosion. However, the alloying elements in the zinc-aluminum-magnesium surface coating form water-soluble ions in the atmospheric corrosion environment, and gradually cover the incision with the flow of the liquid film, forming a stable protective film, covering the red rust at the incision position, significantly improving the incision Corrosion resistance.
(3) Easy stamping: The friction behavior of zinc-aluminum-magnesium coating (ZM) and pure zinc coating (GI) during multiple friction processes was evaluated by a reciprocating friction test machine. The friction coefficient of the zinc-aluminum-magnesium coating is 15% lower than that of the pure zinc coating, and it remains stable during the reciprocating friction process, indicating that the zinc-aluminum-magnesium coating has excellent wear resistance.
3. Compared with the advantages of hot dip galvanizing:
(1) Shorten the process cost: The use of hot-dip galvanized aluminum-magnesium can omit the hot-dip galvanizing and post-treatment processes, as well as supporting transportation, storage and other links, reduce pollutant emissions, improve efficiency, and save costs.
(2) Improvement of corrosion resistance: Under the condition of neutral salt spray test, the plane corrosion resistance of zinc-aluminum-magnesium coating is obviously better than that of hot-dip pure zinc coating.
(3) Increased warranty period: zinc-aluminum-magnesium products can provide more than 30 years of use warranty, which meets the requirements of the photovoltaic industry for more than 25 years.
As the current mainstream application of solar brackets, zinc-aluminum-magnesium panels can be directly processed and used, shortening the processing period of component products, and the project construction period is well controllable. In addition, with its corrosion resistance, wear resistance, coating resistance and good welding processability, it has been widely used in various industries, whether in photovoltaic (construction) industry, automobile manufacturing, animal husbandry or airport. , high-speed rail construction, etc., we can see the figure of zinc-aluminum-magnesium plate.