1. What is anodized aluminum?
It is made of aluminum. It is a product made of aluminum after secondary processing. The processing uses oxidation, and the surface of the aluminum is plated. It has a uniform and dense film to prevent further oxidation of aluminum. It is different from ordinary oxide films. It is dyed using an electrolytic coloring process. Therefore, the surface coating effect is better and is not prone to breakage, peeling, etc. question.
2. The difference between anodized aluminum and aluminum alloy
1. Different properties
Aluminum An alloy is an alloy based on aluminum with a certain amount of other alloying elements added. In addition to the general characteristics of aluminum, it also has some specific characteristics of the alloy due to the different types and amounts of the added alloying elements. For example, the strength is close to high alloy steel, the stiffness exceeds that of steel, it has good casting performance and plastic processing performance, good electrical and thermal conductivity, good corrosion resistance and weldability, and can be used as structural materials in aerospace, aviation, transportation It is widely used in transportation, construction, electromechanical, light chemical and daily necessities. Anodized aluminum is a layer of dense aluminum oxide coated on the surface of aluminum and aluminum alloys to prevent further oxidation. Its chemical properties are the same as aluminum oxide. Aluminum alloy is the material, and anodized aluminum is the process.
2. Different production processes
Aluminum alloys can be Deformed aluminum alloy, semi-finished aluminum alloy such as tubes, rods, wires and shapes made by various pressure processing methods, or cast aluminum alloy, aluminum alloy used to directly cast mechanical parts of various shapes. Anodized aluminum is produced by mechanical polishing, chemical treatment to remove the copper component on the surface of certain alloys, cleaning and degreasing, placing it in dilute sulfuric acid as an anode to energize, forming a surface oxide layer, dyeing, fixing and other processes.
3. Different applications
Aluminum alloy has low density, good mechanical properties, good processing performance, non-toxic, easy recycling, electrical conductivity, and heat transfer It has the characteristics of excellent chemical resistance and corrosion resistance and is widely used in the marine industry, chemical industry, aerospace, metal packaging, transportation and other fields. Anodizing can significantly improve the corrosion resistance of aluminum alloys, increase the surface hardness and wear resistance of aluminum alloys, and have good decorative properties after appropriate coloring treatment.
3. How is anodized aluminum made?
1. Mechanical polishing
If the aluminum material is to be converted into anodized aluminum, construction needs to be carried out on the surface of the material. The first step is polishing. There are specialized The operation of professional polishing instruments can ensure the polishing effect.
2. Chemical copper removal
There are more or less other impurities on the surface of aluminum, and most of them are copper, because it is easy to rust, so it needs to be cleaned, which can be treated chemically.
3. Clean and remove oil
There are some oily substances on the surface of many aluminum materials, which are residues during production and processing. Before anodizing, it needs to be removed with alkaline substances or special chemicals.
4. Electrification to form film
Put the treated aluminum material into the dilute sulfuric acid pool, then insert the electric rod into the pool, energize the reaction, and wait After a period of time, a white translucent film will form on the surface of the aluminum material. This is the oxide layer, which is porous.
5. Dyeing and fixation
After the aluminum material is successfully oxidized, it needs to be dyed. The color can be prepared according to needs. After dyeing, it is heated or soaked. In the chromate solution, the surface pores can be sealed, the color will be fixed, and the surface will become a more beautiful anodized layer.
If the website content violates your rights, please contact us to delete it。
