Five Functions of Anodizing for Aluminum Parts Machined
Aluminum is a very common metal in industry and life. In the process of aluminum parts machined, surface treatment is an important link, varied method and effect is different. Sometimes, only one method will meet the requirements, and sometimes multiple methods can be used to meet the requirements of the product. Among them, anodizing is the most widely used method. And at Creatingway, aluminum parts machined is one of our advantages in CNC machining service,reasonable price, beautiful surface with high quality and performance.
What are the effect of anodizing treatment on aluminum parts machined?
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Enhance the corrosion resistance of aluminum products.
Anodic oxidation can obtain a layer of 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, anodized aluminum material in the chromic acid solution, the surface of the oxide film is compact and corrosion resistant, especially suitable for riveting and welding parts; but for it in sulfuric acid solution, the formation of oxide film thickness is higher and with stronger adsorption ability, just because of the porosity is larger than the former, appropriate padding is required.
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Improve the adsorption capacity of aluminum products to pigments.
Aluminum products processed after chemical or electrochemical polishing and then by anodic oxidation, an oxide film with high transparency is formed on the surface. Moreover, the oxide film is porous and has good adsorption capacity which can effectively adsorb a variety of organic or inorganic dyes, as well as paint and organic film. This aluminum product can have all sorts of bright color, It’s not only increases the appearance of aesthetics, but also can play a good anticorrosion effect.
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Enhance the abrasion resistance of aluminum products.
The anodic oxidation film is not only anticorrosive but also very dense. The existence of this oxide film greatly enhances the abrasion resistance of aluminum products, which can effectively adapt the aluminum parts to the working state of friction, such as the use of automobile engine cylinder, piston and other parts.
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To realize the electrical insulation of aluminum products.
The anodized film, whose chemical structure is metal oxide, rather than metal, has strong electrical insulation. Some aluminum materials require electrical insulation, such as capacitance dielectric layers. This can be achieved by anodic oxidation.
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As a substrate for aluminum plating.
Aluminum and aluminum alloy products must be applied to the substrate prior to plating. There are many ways to apply the bottom layer on the surface of aluminum products, including electrogalvanization, zinc dip, electroless nickel plating, and of course, anodic oxidation treatment. Due to the porous properties of anodic oxidation film, the effect of electroplating process can be promoted.
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