anodizing aluminum alloy

Five functions of anodic oxidation of CNC machining aluminum alloy parts

Aluminum alloy is a very common kind of metal in industry and life. In the process of aluminum parts machining, surface treatment is important, various methods can bring different effects. Sometimes, there is only one method to meet the requirements, and sometimes multiple methods can meet the requirements of the product. Among them, anodizing is the most widely used method. In metalworking, machining aluminum parts is one of our advantages in CNC machining services, reasonable price, beautiful surface, quality, and performance.

What effect does anodizing have on machined aluminum parts

Enhance the corrosion resistance of aluminum products. Aluminum alloy parts processing

Anodizing can obtain an oxide film on the surface of aluminum products. The chemical properties of the oxide film are very stable and have strong corrosion resistance. For example, in chromic acid solution, the surface of the anodized aluminum oxide film is dense and corrosion-resistant, which is especially suitable for riveting parts; but in sulfuric acid solution, the thickness of the oxide film formed is higher and the adsorption capacity is stronger, only due to the porosity Larger than the former, proper packing is required.

Improve the adsorption capacity of aluminum products to pigments.

Aluminum products are chemically or electrochemically polished and then anodized to form an oxide film with high transparency on the surface. In addition, the oxide film is porous and has good adsorption capacity, which can effectively absorb a variety of organic or inorganic dyes, as well as paints and organic films. This aluminum product can have various bright colors, which not only increases the beauty of the appearance but also has a good anti-corrosion effect.

Improve the wear resistance of aluminum alloy parts.

The anodic oxide film is not only resistant to corrosion, but also very dense. The existence of this oxide film greatly enhances the wear resistance of aluminum products, and can effectively adapt aluminum products to the working state of friction, such as the use of automobile engine cylinders, pistons, and other parts.

To achieve electrical insulation of aluminum alloy parts.

The chemical structure of the anodized film is a metal oxide, not a metal, and has strong electrical insulation. Some aluminum materials require electrical insulation, such as capacitive dielectric layers. This can be achieved by anodizing.

As a base material for aluminum plating.

Aluminum alloy products must be coated on the substrate before electroplating. There are many ways to coat the surface of aluminum products, including electro galvanizing, zinc dipping, electroless nickel plating, and of course, anodizing. Due to the porosity of the anodized film, the effect of the electroplating process can be promoted.

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