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Discussion on Six Processes of Surface Treatment of Aluminum Alloy

Update:10-10-2017
Summary:

   Aluminum surface treatment is divided into: sandblas […]

   Aluminum surface treatment is divided into: sandblasting (matte pearl silver surface), polished (the formation of mirror), drawing (forming a similar satin effect), plating (covering a layer of other metals), spraying (covering other non-metallic coating Layer)

   1. Sandblasting (shot peening)
The process of cleaning and roughening the metal surface with the impact of high speed sand flow. This method of aluminum surface treatment can make the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the workpiece surface is improved, thus improving the fatigue resistance of the workpiece, increased between it and the coating Of the adhesion, extending the durability of the coating, but also conducive to the leveling and decoration of the paint. The process we often see in Apple's various products, as well as by the existing TV case or in the box is also increasingly used.
2.
Polished
The use of mechanical, chemical or electrochemical methods to reduce the surface roughness of the workpiece in order to obtain bright, flat surface processing methods. Polishing process is divided into: mechanical polishing, chemical polishing, electrolytic polishing. Aluminum parts with mechanical polishing + electrolytic polishing can be close to the stainless steel mirror effect, giving a high-end simple, stylish future feeling (of course, easy to leave fingerprints but also more care).
3. Drawing
Metal wire drawing is repeated with sandpaper to scrap the aluminum plate manufacturing process. Drawing can be divided into straight wire drawing, chaos drawing wire, wire drawing, thread drawing. Metal wire drawing process, you can clearly show every fine silk marks, so that the metal matte glow in the fine hair shiny, both fashion products and technology.
4. High light cutting
Strengthen the diamond knife in the high-speed rotation (general speed of 20000 r / min) engraving machine spindle cutting parts, in the product surface to produce local highlights area. The brightness of the cutting high light is affected by the speed of the milling bit. The faster the bit is, the brighter the bristles of the cutting, and the darker it is. High-light high-light cutting in the use of mobile phones in particular, such as iphone5, in recent years, some high-end TV metal frame with a high light milling process, coupled with anodizing and drawing process makes the whole TV is full of fashion sense and technology sharp sense.
5. Anodizing
Anodic oxidation refers to the electrochemical oxidation of metal or alloy, aluminum and its alloys in the corresponding electrolyte and specific process conditions, due to the role of external current in the aluminum products (anode) on the formation of a layer of oxide film process. Anodic oxidation not only can solve the aluminum surface hardness, wear resistance and other defects, but also to extend the life of aluminum and enhance the aesthetic degree, has become an indispensable part of aluminum surface treatment, is currently the most widely used and very successful Process.
6. Two-color anodized
Two-color anodic oxidation refers to the oxidation of anodic oxide on a product and imparts a different color to a particular area. Two-color anodic oxidation because of the complexity of the process, the higher the cost; but through the contrast between the two colors, better reflect the high-end products, unique appearance.

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