Six Technologies for Surface Treatment of Aluminum Alloy Material

West Aluminum - West Aluminum Industry Telecom:  Metal materials are used more and more in all kinds of existing products, because metal materials can better reflect product quality and highlight brand value. Among many metal materials, aluminum is the first to be used by various manufacturers because of its easy processing, good visual effect and abundant means of surface treatment. The surface treatment of aluminum profiles is mainly divided into sand blasting (forming matte pearl silver surface). Polishing (forming mirror), drawing (forming satin-like effect), electroplating (covering a layer of other metals), spraying (covering other non-metallic coatings)

1. Sandblasting (shot peening)

The process of cleaning and roughening metal surface by the impact of high-speed sand flow. The surface treatment of aluminium parts by this method can obtain a certain degree of cleanliness and different roughness, and improve the mechanical properties of the workpiece surface. Therefore, the fatigue resistance of the workpiece is improved, the adhesion between the workpiece and the coating is increased, the durability of the coating is prolonged, and it is also conducive to the leveling and decoration of the coating. This process is often seen in Apple's products, and is increasingly used in existing TV shells or midframes.

2. polishing

By means of mechanical, chemical or electrochemical methods, the surface roughness of the workpiece is reduced to obtain a bright and flat surface processing method. Polishing technology is mainly divided into: mechanical polishing, chemical polishing, electrolytic polishing. Aluminum parts with mechanical polishing and electrolytic polishing can approach the mirror effect of stainless steel, giving people a feeling of high-grade, simple, fashionable future (of course, easy to leave fingerprints but also more care).

3. wire drawing

Metal wire drawing is a process of repeatedly scraping aluminium sheet out of line with sandpaper. Drawing can be divided into straight wire drawing, screwed wire drawing, screwed wire drawing, screwed wire drawing. Metal wire drawing process can clearly show each fine trace, so that the metal matte gloss in the exudation of fine silk luster, products both fashionable and technological sense.

4. High-light cutting

The diamond knife is strengthened on the spindle of the high-speed rotary fine-engraving machine with a fine-engraving machine to cut the parts, and a local bright area is generated on the surface of the product. The brightness of cutting highlight is affected by the speed of the milling bit. The faster the bit speed is, the brighter the cutting highlight is. On the contrary, the darker the cutting highlight is and the easier the cutter grain is. In recent years, high-light milling technology has been used in some metal frames of high-end TV sets. In addition, the anodic oxidation and wire drawing technology make TV sets full of fashion sense and sharp sense of science and technology.

5. Anodic oxidation

Anodic oxidation refers to the electrochemical oxidation of metals or alloys. Under the corresponding electrolyte and specific technological conditions, aluminum and its alloys form an oxide film on the aluminium products (anodes) due to the action of applied current. Anodic oxidation can not only solve the defects of surface hardness and wear resistance of aluminium, but also prolong the service life of aluminium and enhance its beauty. It has become an indispensable part of surface treatment of aluminium. It is the most widely used and very successful technology at present.

6. Bicolor Anodic Oxidation

Dual-color anodization refers to the process of anodizing a product and giving different colors to a specific area. Dual-color anodic oxidation has high cost because of its complex process, but through the contrast between the two colors, it can better reflect the high-end and unique appearance of the product.

(Chongqing Xialu Xinda Aluminum Industry Co., Ltd. Publicity Department collates contributions)

Source: Network

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