Industrial aluminum profile powder coating is actually a type of powder coating. That is to say, using powder equipment (electrostatic spraying machine), the powder coating is sprayed onto the surface of industrial aluminum profiles or workpieces. Then, under the effect of static electricity, the powder will evenly adhere to the surface of industrial aluminum profiles, forming a powder coating. After being subjected to high-temperature baking, leveling, and fixation, it becomes coatings with different effects. This process is called industrial aluminum profile powder coating. 

The purpose of powder coating for industrial aluminum profiles is to enhance the adhesion of the surface of the industrial aluminum profiles, increase the corrosion resistance and oxidation resistance of the surface of the industrial aluminum profiles, improve the appearance quality and mechanical properties of the industrial aluminum profiles. At the same time, it can also remove impurities such as oil stains and dirt from the surface of the industrial aluminum profiles. 
The powder coating process for industrial aluminum profiles includes pre-treatment (degreasing, water washing, chemical conversion washing, drying), electrostatic powder spraying, leveling, and curing. 
Advantages of powder coating for industrial aluminum profiles: It can be produced automatically or by using mechanical equipment. There is no need for manual spraying of individual industrial aluminum profiles. Industrial aluminum profile powder can be sprayed at room temperature without the need for preheating. This saves costs. The powder coating material can be recycled, significantly reducing enterprise costs. The coating can be freely controlled from thin to thick, which can save the number of coating layers and improve the efficiency of powder spraying. The powder sprayed coating is beautiful and durable. It can be sprayed in various colors. 
Two common connection methods for industrial aluminum profile frames: 
The corner connection (used for the external connection of angle-shaped profiles, which can be divided into three angles of 90°, 45°, and 135° and can fix the sealing plates.) has a high load-bearing capacity and is widely used. It is one of the common methods for assembling industrial aluminum profile frames. 
2. Bolt connection (used for 90-degree connection between two profiles, convenient for installation and disassembly, often used for simple profile cover connections, relatively reliable.) can be used in combination with angle pieces, featuring high load-bearing capacity, firmness, and ease of assembly. It is an excellent assembly method for industrial aluminum profile frames. 
3. Slot Connection When the customized frame length exceeds 6 meters, an extended connection will be used. The commonly used accessory is the slot rod connector. It is used for connecting the end faces of industrial aluminum profiles, and by splicing, a longer length can be achieved. 
4. Corner joints. The angle connection is also known as the corner joint. Commonly used connection components include inclined angle connection pieces, 45-degree angle connection pieces, 135-degree angle connection pieces, and angle groove connection pieces, etc. The cross-sectional shape of the profile needs to be cut to ensure the accuracy of the cut angle and avoid connection gaps. 
5. Activity hinge: This hinge is used for the movable connection between profiles, with a rotation range of 180 degrees. There are various ways of connection. 
The unevenness of metal flow will increase with the increase of external friction force. This is because the required aluminum extrusion pressure increases, and at the same time, due to the increased frictional resistance between the metal and the extrusion cylinder, the extrusion pressure in industrial aluminum profile processing will also increase significantly. Generally speaking, during the forward hot extrusion of aluminum profiles, due to the frictional resistance between the billet and the extrusion cylinder, the extrusion pressure is 25%-35% higher than that in the reverse direction.