As we all know, aluminum is a common metal in nature. Aluminum is relatively high on the periodic table of chemical elements. Aluminum is a relatively active metal that can react with any metal. Therefore, aluminum is often used as a CNC processing material. Today, Nuoba will explain to you what are the post-processing of aluminum alloy? And the process flow of aluminum alloy passivation treatment.
Processing of aluminum alloy parts
1、 Four common post processing of aluminum alloy:
1. High gloss cutting: use a precision engraving machine to cut some parts on the aluminum alloy surface, so that these cut surfaces show bright areas. This processing technology is generally used on mobile phones and high-end TVs, especially those high-end TVs, to make the appearance of TVs more fashionable and present a sharp sense of technology.
2. Sand blasting: the process is to clean and roughen the aluminum alloy surface by using the impact of high-speed sand flow, so that the aluminum alloy surface can obtain a certain degree of cleanliness and roughness. The mechanical properties of aluminum alloy can be improved by sand blasting, which not only improves the fatigue resistance of aluminum alloy products, but also increases the adhesion and durability of aluminum alloy products and surface coatings.
3. Wire drawing: This process refers to repeatedly grinding and scraping the aluminum alloy surface with sandpaper until the lines are scraped. There are many kinds of wire drawing, including straight lines, random lines, linear lines, spiral lines, etc. After wire drawing, each line can be clearly seen on the aluminum alloy surface. At the same time, the metal frosting of aluminum alloy products will show fine hair luster, making aluminum alloy products more fashionable and scientific.
4. Polishing: This process refers to the use of mechanical, chemical or electrochemical methods to polish the surface of aluminum alloy products to reduce the surface roughness of aluminum alloy products and make the surface of aluminum alloy products more smooth and bright. The surface effect of polished aluminum alloy products is close to the mirror effect of stainless steel, which can give a very high-end and fashionable visual effect.
Processing of aluminum alloy parts
2、 Process flow of aluminum alloy passivation treatment:
The aluminum alloy passivation treatment process is applicable to the passivation treatment of various galvanized products, which can effectively prevent the corrosion and oxidation of the galvanized product surface, improve the corrosion resistance of the metal surface, and keep the galvanized parts bright for a long time. What is the process flow of aluminum alloy passivation treatment?
Aluminum and aluminum alloy products can obtain smooth, bright and transparent oxide film after chemical or electrochemical polishing and anodizing, and can obtain various colorful surfaces after dyeing. If it is oxidized under certain technological conditions, a layer of glaze like film can be formed on the surface of the aluminum products to obtain special decorative effects.
The first process: pre degreasing - main degreasing - water rinsing - water rinsing - whitening and descaling - ultrasonic ash removal and rinsing - water rinsing - activation - water rinsing - water rinsing - passivation - water rinsing - water rinsing - baking. This is a relatively complete process flow, which is widely suitable for different passivation environments and aluminum alloy products.
The second process: process flow after aluminum alloy polishing: degreasing - water rinsing - water rinsing - activation - water rinsing - water rinsing - passivation - water rinsing - water rinsing - water rinsing - drying. If the workpiece is mechanically polished, the film color is required to be the natural color, and the requirements for corrosion resistance are not high.
The third kind of simplified process flow: if the neutral salt spray test is required to be about 48-72 hours, degreasing - water rinsing - water rinsing - passivation - water rinsing - water rinsing - drying can be used. On the basis of the above, if the workpiece is well drained and the structure of the workpiece is simple, the fourth simplified process can be adopted: degreasing - water rinsing - passivation - water rinsing - baking.
In the production process of aluminum alloy, various passivation methods can be used, such as spraying and air blowing, immersion and controlled drying or air blowing, or roller coating and coating. The passivation solution can timely form a uniform passivation film with strong protective performance on the aluminum surface, which can be applied to the anti-corrosion treatment of aluminum alloys and aluminum die castings, forming a transparent and light colored coating on the surface; It can also be used for pretreatment of spraying, powder spraying and gluing treatment; This product does not contain hexavalent chromium, environmental protection, safety, non-toxic, simple operation, wastewater treatment, and low unit cost.