Zhongshan Aluminum Anodizing: Some Knowledge Points of Zhongshan Aluminum Anodizing
Release time:
2021-05-21
zhongshan aluminum anodic oxidationIt includes many contents, such as the limitation of sulfuric acid anodizing on aluminum alloy materials, the pretreatment of aluminum anodizing, and the color analysis of aluminum alloys with different contents after oxidation. The following from the following three aspects of the analysis, for reference only.
1. The limitations of aluminum anodizing in Zhongshan. The presence of alloying elements reduces the quality of the oxide film. Under the same conditions, the thickness of the oxide film obtained on pure aluminum is thicker, the hardness is higher, the corrosion resistance is better, and the uniformity is better. For aluminum alloy materials, in order to obtain a good oxidation effect, it is necessary to ensure the aluminum content, usually not less than 95%.
In the alloy, copper will make the oxide film red, destroy the quality of the electrolyte, and increase the oxidation defects; silicon will make the oxide film gray, especially when the content exceeds 4.5%, the effect is more obvious; due to its own characteristics, iron will be in the form of black spots after anodic oxidation.
2. Anodizing pretreatment of Zhongshan aluminum. The surface treatment of aluminum is a combination of a series of mechanical and chemical surface pretreatment processes and surface film formation processes. There are two methods of surface pretreatment of aluminum: mechanical method and chemical method. Mechanical methods include sandblasting, brushing, scanning, and polishing; chemical methods include degreasing, alkaline washing, and matting. Aluminum surface film forming technology mainly includes anodic oxidation, chemical conversion, electroplating and chemical plating, organic coating and so on. Chemical transformations include chromizing, phospho-chromizing and chromium-free chemical transformations, suitable for organic polymer coating substrates.
3. The color after anodizing of Zhongshan aluminum with different content. If the oxide film is required to be colorless and transparent after oxidation, the 5 and 6 series aluminum alloys are better, and they can also be colored after oxidation. If only the anodic oxidation of Zhongshan aluminum is required to form a dense anodic oxide film, and there is no requirement for color, most aluminum alloys can be oxidized. Before choosing the oxidation process, we should have an understanding of the material of aluminum or aluminum alloy, because the difference in the quality and composition of the material will directly affect the quality of Zhongshan aluminum anodizing. After oxidation, it is brown-blue, and with the increase of manganese content in aluminum, the surface color after oxidation changes from brown-blue to dark brown.
The above is for you to introducezhongshan aluminum anodic oxidationI hope I can help you.