oxidation aluminum tube

Oxidation of aluminum tubes refers to a material protection technology that forms an oxide film on the surface of aluminum tubes in an electrolyte solution by applying an anode current, also known as surface anodic oxidation. After the surface of the aluminum pipe material or product is anodized, its corrosion resistance, hardness, wear resistance, insulation and heat resistance are greatly improved. The most anodized metal material is aluminum. The anodization of aluminum tubes is generally carried out in an acidic electrolyte, with aluminum as the anode. During the electrolysis process, the anion of oxygen interacts with aluminum to produce an oxide film. This kind of film is not dense enough when it is first formed. Although it has a certain resistance, the negative oxygen ions in the electrolyte can still reach the surface of aluminum and continue to form an oxide film. As the film thickness increases, the resistance also increases, and thus the electrolysis current decreases. At this time, the outer oxide film in contact with the electrolyte is chemically dissolved. When the rate of oxide formation on the aluminum surface is gradually balanced with the rate of chemical dissolution, the oxide film can reach the maximum thickness under this electrolysis parameter. The outer layer of the anodized film of aluminum is porous, and it is easy to absorb dyes and colored substances, so it can be dyed and improve its decorative properties. After the oxide film is sealed with hot water, high temperature steam or nickel salt, its corrosion resistance and wear resistance can be further improved. In addition to aluminum, the metals used in industry for surface anodization include magnesium alloys, copper and copper alloys, zinc and zinc alloys, steel, cadmium, tantalum, zirconium, etc.
 


The advantages of the aluminum tube itself: First, the advantages of welding technology: the welding technology of thin-walled copper-aluminum tubes suitable for industrial production is known as a world-class problem, and it is the key technology for replacing copper with aluminum for connecting tubes of air conditioners.
The second is the advantage of service life: from the perspective of the inner wall of the aluminum tube, since the refrigerant does not contain moisture, the inner wall of the copper-aluminum connecting tube will not corrode.