Anodized aluminum is an electrolytic oxidation process in which the surface of aluminum and aluminum alloys is usually transferred into an oxide film, which has protective, decorative, and other functional properties. According to this definition, the anodization of aluminum only includes the process of forming an anodized film.
The metal or alloy parts are used as anodes to form oxide films on the surface by electrolysis. Metal oxide films change the surface state and properties, such as surface coloring, improve corrosion resistance, enhance wearing resistance and hardness, protect the metal surface, etc. For example, in aluminum anodic oxidation, aluminum and its alloy are placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, under the action of specific conditions and applied current, electrolysis. The anodic aluminum or its alloy oxidizes, forming a thin layer of alumina on the surface, whose thickness is 5 ~ 30 microns, and the hard anodic film can reach 25 ~ 150 microns. Anodized aluminum or its alloy, improves its hardness and wear resistance, up to 250 ~ 500 kg/square mm, good heat resistance, hard anodized film melting point up to 2320K, excellent insulation, breakdown voltage up to 2000V, and enhanced corrosion resistance. It does not corrode in ω=0.03NaCl salt spray for thousands of hours. The oxide film has a large number of micropores in the thin layer, can adsorb various lubricants, suitable for the manufacture of an engine cylinder or other wear-resistant parts; Membrane microporous adsorption capacity can be colored into a variety of beautiful colors. Non-ferrous metals or their alloys (such as aluminum, magnesium and their alloys, etc.) can be anodized. This method is widely used in machinery parts, aircraft and automobile parts, precision instruments and radio equipment, daily necessities and building decoration, etc.
The national standard generally adopts the traditional chemical analysis method to analyze the composition grade of alumina. The method is tedious according to the analysis cycle and in strict accordance with GB/T15000.1-15000.5-1994 and YS/T409-1998 standard provisions. After sample preparation, mixing, fixed value, uniformity test, normal distribution test, stability verification, production analysis, and use assessment and other complex processes, and then through the unanimous evaluation of the identification committee, the sample composition design is reasonable, in line with YZ/T272-1998 "Alumina" product standard chemical composition requirements, can be considered as national qualified products.
Established in 1993, Guangdong Zhonglian Aluminum is a large comprehensive aluminum profile enterprise that covers an area of 100,000 square meters with more than 800 staff that specializes in developing, designing, and manufacturing, especially has a particular advantage in anodizing, the quality of the product has reached the international leading level.
Item | Technology Value |
Thickness of film | AA10、AA15、AA20、AA25 |
Hole sealing | ≤ 30mg/d ㎡ |
Corrosion resistance | ≥ 9 level |
Wear resistance | ≥300g/um |
Features Of Zhonglian Anodized Aluminum profiles:
1) The oxide film thickness exceeds 13mu
2) Use oxidized sand No. 100
3) Finely sanded without any mechanical lines
4) Not easy to scratch, no grit
5) Super wear resistance, weather resistance, corrosion resistance
Guangdong Zhonglian Aluminum GB Matt Anodized Black, is the top seller among our other hot-selling products in Guangdong Zhonglian Aluminum, which you can hardly find mechanical lines on the surface(better than other factories) with beautiful fine sandblasting processing. The surface can hardly be scratched with an anodizing thickness between 10 and 13 um. Small scratch marks can be easily removed. However, other profile products with the same color in the market would easily be bruised because of a smaller thickness, and it's also difficult to remove the scratch marks on their surfaces.
