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What is an alumina sheet?

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Alumina sheet is to process the aluminum sheet to form an oxide film on the surface. We call it an alumina sheet. According to different process, the alumina sheet is also divided into anodized aluminum sheet and chemical alumina sheet.
 The anodized aluminum sheet is an anode placed in a corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as an anode, and subjected to electrolysis under specific conditions and an applied current. The aluminum sheet of the anode is oxidized, and a thin layer of aluminum oxide is formed on the surface, and the thickness thereof is 5 to 20 μm, and the hard anodized film is 60 to 200 μm.
 A chemical alumina sheet is a process in which an aluminum sheet is reacted in a weakly alkaline or weakly acidic solution, and some of the base metal reacts to thicken the surface of the natural oxide film or produce some other passivation film. The commonly used chemical oxide film has a chromic acid film. And phosphoric acid membranes, which are both thin and highly absorbing, can be colored and sealed.
 Anodizing and chemical oxidation have different properties of oxide film due to different processes. Compared with aluminum anodized film, chemical oxide film is much thinner, has lower corrosion resistance and hardness, and is not easy to color. Since the coloring resistance after coloring is inferior, the coloring and color matching of the aluminum sheet are only described for the anodizing treatment.
alumina sheet
 Advantages and characteristics of alumina board:
 1. It has good processability: anodized aluminum sheet, moderate hardness, can be bent and formed, and can be continuously processed at high speed. It is very suitable for the processing of enterprise products. Since the anodized aluminum sheet is highly decorative, it does not need to be produced after the production of the enterprise. The surface treatment process can greatly reduce production costs and production cycle for enterprises.
 2. Has long-lasting weather resistance: the standard thickness oxide film (3μm) of the anodized aluminum sheet is not discolored for a long time, does not corrode, does not oxidize, and does not rust. An anodized aluminum sheet with a thick oxide film (10 μm) can be used outdoors, and can be discolored without being exposed to the sun for a long time.
3. Beautiful appearance and strong metal feeling: The surface of the anodized aluminum sheet has high hardness, can reach gem grade, has good scratch resistance, no paint coverage on the surface, retains the metallic color of the aluminum sheet, highlights the modern metallic sense, and improves the product grade and added value.
4. Environmental protection, high temperature resistance: Alumina sheet is a pure metal product with no other chemical substances on the surface. It can be burned at 600 °C without toxic gas, and fully meets the requirements of fire protection and environmental protection.
5. Resistant to pollution, wide range of use: Alumina sheet, no fingerprints, no stain marks, easy to clean, no corrosion spots. Can be widely used in metal aluminum ceilings, curtain wall panels, aluminum-plastic panels, fire panels, honeycomb aluminum panels, aluminum veneers, electrical panels, cabinet panels, furniture panels and so on. Anodized aluminum sheets are also good materials for mechanical parts, aircraft automotive parts, precision instruments and radio equipment, automotive decoration and other industries.

Mingtai aluminum sheet manufacturer can manufacture and supply high quality 1000 series-8000 series aluminum sheet/plate/coil/foil with 18 years experience.