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2021.7.24
With the progress of the times and the development of various means of transportation, such as aircraft, ships, cars and even household products, office furniture all use aluminum shell. It can be said that it is widely used in many fields, which is closely related to people’s life. However, many aluminum profiles are oxidized and lose luster every year. At this time, we need to polish them. Now let’s introduce the aluminum polishing method and process, as well as how to polish them by hand and mirror finish.
General polishing is divided into three forms: polishing, mechanical polishing and electric polishing. In the process of polishing cars or ships, we should grasp the sequence, first carry out mechanical polishing, and then electric polishing, so as to achieve brightness, restore the luster of the past, and color the aluminum profile shell.
1. Anodizing, remove the alumina on the aluminum profile shell for effective polishing.
2. Electrolytic polishing, electrolytic polishing uses chemical reaction, takes electrolytic polishing as anode and insoluble metal as cathode, immerses it into the electrolytic cell, applies direct current, dissolves the anodic alumina, and disappears the alumina from the aluminum profile shell to restore luster.
3. Chemical polishing can be used as a pretreatment process for protective and decorative electroplating, and also as a pretreatment process for chemical film-forming, such as phosphating hair blue. If the antirust passivation agent solution is immersed before painting, the alumina on the surface of the aluminum profile shell can be eliminated.
4. Color after anodizing in electrolytic reaction, form various colors on the oxide film, and then color it. This depends on your requirements.
The above four methods are common polishing methods. They are also relatively low cost and strong operability. They can effectively remove alumina from the surface of aluminum profile shell, achieve the effect of polishing and restore the original luster of aluminum profile shell.
1. Pre-treatment of aluminum polishing: including oil removal, dirt removal, gum removal, etc. The purpose is to ensure the uniformity of polishing in the next step.
2. When using aluminum polishing agent stock solution, do not add water into the polishing solution. Increase the temperature of the polishing agent stock solution to 80-95 degrees Celsius, immerse the clean aluminum material in the polishing agent at 80-95 degrees Celsius, and gently agitate the aluminum workpiece. There must be a certain gap between the aluminum materials, not overlapping, after immersing for 2 to 3 minutes, take out the aluminum workpiece and clean it in clean water in time.
3. Ash removal and passivation: There will be a layer of ash on the surface of the polished aluminum parts. Immerse the aluminum parts in the ash-removing passivation agent and rinse for 30 seconds, then take out the aluminum parts and wash them with clean water.
4. Blow dry or dry aluminum workpieces.
1. First polish with a small grinding wheel with a small drill belt for repairing circuit boards, and then use the finest sandpaper
2. Rough oilstone 400 # – fine oilstone 600 # – fine sandpaper 800 # – Metallographic sandpaper W5 – polishing paste. Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. The rapid development of industrial economy is right The increasing demand for aluminum alloy welded structural parts has led to in-depth research on the weldability of aluminum alloy. At present, aluminum alloy is the most used alloy.
This is simple! Mirror polishing of aluminum requires higher and more difficult. Generally, it is realized by equipment, using some grinding discs, grinding fluid, and grinding wheels to operate. If it is For the flat surface, use a flat surface grinder. At present, the technology is quite mature, and many exterior parts of high-end mobile phones are made of aluminum, which is environmentally friendly, and the mirror surface is quite good. If it is an irregular surface, use a grinding wheel to manually polish, the effect is average! The efficiency is slow !
The surface treatment methods of aluminum alloy include anodizing, electroplating, infiltration, surface spraying, shot peening, and vacuum spraying. 1. Anodizing : Anodizing is to use the electrolysis principle of DC, AC and DC to form an oxide film on the surface of the workpiece or product to increase the corrosion resistance and make the appearance beautiful.