The anodised aluminium plate is an anode made of aluminium substrates in corresponding electrolytes (such as sulfuric acid, chromic acid, oxalic acid, etc.) under specific conditions and applied current. A thin layer of alumina is formed on the surface with a thickness of 5-20 microns and a hard anodic oxide film of 60-200 microns.
The hardness and wear resistance of aluminium sheet after anodizing are improved. It can reach 250-500 kg/square millimeter. It has good heat resistance. The melting point of hard anodizing film is up to 2320 K, excellent insulation, breakdown voltage is up to 2000V. It enhances the corrosion resistance and does not corrode in_=0.03NaCl salt fog for thousands of hours. There are a large number of micro-holes in the oxide film, which can absorb various lubricants. It is suitable for making engine cylinders or other wear-resistant parts. The film has strong adsorption capacity and can be colored into various beautiful colors.
Applications field of anodised aluminium plate:
Anodised aluminium plate is widely used in machinery parts, aircraft and automobile parts, precision instruments and radio equipment, building decoration, machine shell, lighting, electronic consumer goods, crafts, household appliances, interior decoration, sign, furniture, automobile decoration and other industries.
Characteristic of anodised aluminium plate:
1. Good workability: the positive alumina board has strong decorative, moderate hardness, easy bending and forming, continuous high-speed stamping, convenient for direct processing into products, without complex surface treatment, greatly shorten the production cycle of products and reduce production costs.
2. Weather resistance: standard thickness of oxide film (3 micron) of anodic alumina plate indoor use for a long time without color, corrosion, oxidation, rust. Anodic alumina sheets with a thicker oxide film (10 micron) can be used outdoors and remain colourless under long-term exposure to sunlight.
3. Metal Sensitivity: Anodized aluminium sheet has high surface hardness, good scratch resistance, no paint coverage on the surface, retains the metal color of the aluminium sheet, highlights the modern metal sensation, and improves the product grade and added value.
4. High fire resistance: pure metal products, no paint and any chemical substances on the surface, 600 degrees high temperature does not burn, does not produce toxic gases, in line with the requirements of fire protection and environmental protection.
5. Strong anti-fouling: no fingerprints, no stains, easy to clean, no corrosion spots.
6. Strong applicability: wide application, suitable for metal aluminum ceiling, curtain wall panel, aluminum-plastic panel, fire-proof panel, honeycomb aluminum panel, aluminum veneer, electrical panel, cabinet panel, furniture panel, etc.