There are many surface treatments for industrial aluminum profiles, as we introduced earlier, including chemical treatment and physical treatment, which are divided into many sub categories.
Mill finish is a product extruded from aluminum profiles that has not undergone any surface treatment, just like a house without decoration. We can use blank for various customized product surface treatments.
Chemical treatment includes the following categories:
Anodizing is an electrochemical oxidation process that takes aluminum material as the anode, places it in an electrolyte solution, and uses the action of the electrolyte to form a dense oxide film on the surface of aluminum profiles. This process is called aluminum profile anodizing.
Electrophoretic coating is a coating method in which the workpiece and corresponding electrodes are placed in a water-soluble coating, connected to a power source, and the physical and chemical effects generated by the electric field are used to evenly precipitate and deposit the resin and pigments in the coating on the surface of the electrode, forming an insoluble paint film.
The powder coating is fed into the spray gun by the powder supply system using compressed air gas. A high-voltage electrostatic generator is added to the front end of the spray gun to generate high voltage. Due to corona discharge, dense charges are generated near it. When the powder is sprayed out of the gun nozzle, charged coating particles are formed, which are attracted to the workpiece with opposite polarity by electrostatic force. As the amount of powder sprayed increases, the accumulation of charges also increases. When a certain thickness is reached, Due to the electrostatic repulsion effect, the entire workpiece does not continue to adsorb, resulting in a certain thickness of powder coating. After being heated, the powder is melted, leveled, and solidified, forming a hard coating film on the surface of the workpiece.
Alkali sand oxidation is a chemical reaction, also known as boiling oxidation or pyroalkali oxidation; The principle of alkaline sand oxidation is to place aluminum profiles in a solution containing strong alkaline and strong acids such as sodium nitrate, sodium hydroxide, nitric acid, sulfuric acid, phosphoric acid, etc. After a certain period of time and temperature, a certain thickness of oxide film is formed.
Physical processing
There are several types of physical surface treatments:
Usually, it is a way to remove the oxide film, stains, and paint on the surface of aluminum profiles to make them cleaner.
The polishing mentioned here refers to physical polishing, and aluminum profile polishing is mainly achieved through two methods: mechanical polishing and chemical polishing. Mechanical polishing is the process of processing the surface of aluminum profiles through polishing wheels coated with polishing wax, reducing surface roughness, making the surface smooth, and achieving a bright or mirror like effect. Rolling is a method of grinding workpieces using abrasives and grinding fluids, which can achieve a mirror or near mirror finish on the surface of the workpiece.
Regardless of the method, the goal is to improve the smoothness and smoothness of aluminum profiles.
Aluminum profile drawing is a method of surface treatment for aluminum profiles. Through drawing technology, each line can be clearly seen, improving the texture of metal materials, and increasing product aesthetics, fashion, and technology. Wire drawing can eliminate scratches, scratches, and machining tool marks on aluminum profiles. The degree of elimination is related to the depth of wire drawing. Generally speaking, the greater the depth of wire drawing, the more effective it is to eliminate defects on the surface of aluminum profiles.