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Metallic material or article after surface anodized, corrosion resistance, hardness, wear resistance, insulation, heat resistance, etc. are greatly improved. Anodized metal material up to deal with implementation is aluminum. Anodized aluminum is generally carried out in an acidic electrolyte, containing aluminum as an anode. In the electrolysis process, the role of oxygen anions and aluminum oxide film produced. This film is formed early enough fine, although some resistance, but the negative oxygen ions in the electrolyte can still reach the surface continues to form an aluminum oxide film. As the film thickness increases, resistance also becomes large, so that the electrolytic current becomes small. At this time, the outer oxide film in contact with the electrolyte chemical dissolution. When the speed of the aluminum oxide surface gradually and chemical dissolution rate of the balance, the maximum thickness of the oxide film can be achieved under the electrolysis parameters. Aluminum porous anodic oxide film outer layer, and is easily adsorbed dye colored substances, which can be dyed to improve its decorative property. After the oxide film and then hot water, high temperature steam or nickel salt blocking treatment can further improve the corrosion resistance and abrasion resistance. In addition to aluminum, the use of surface anodized metal alloys as well as magnesium, copper and copper alloys, zinc and zinc alloys, titanium, steel, cadmium, tantalum, zirconium, etc. industry.

Aluminum is the thickness of less than 0.2mm to 500mm, 200mm width of more than 16m within the length of aluminum called aluminum sheet or aluminum sheet, 0.2mm or less as aluminum, less than 200mm width row material or strip (of course with the progress of large equipment, the widest 600mm discharge timber can be done will be more). It refers to the processing of aluminum ingots rolled rectangular plate, divided into pure aluminum, aluminum alloy, thin aluminum, the thick aluminum pattern aluminum. Aluminum generally be divided according to the following two: 1. Press the alloy composition is divided into: High-purity aluminum (99.9 by the content of high purity aluminum rolling from above) Pure aluminum (aluminum is made by rolling the basic ingredients) Aluminum alloy (alloy of aluminum and assisted composition, usually aluminum copper, aluminum and manganese, aluminum silicon, aluminum and magnesium, and other series) Qian welding aluminum or composite plate (composite materials through a variety of means to obtain special-purpose aluminum material) Clad aluminum (aluminum outer coating thin aluminum used for special purposes) 2. Press the thickness of the unit is divided into :( mm) Sheet metal (aluminum sheet) 0.15-2.0 Conventional plate (aluminum sheet) 2.0-6.0 Plate (aluminum plate) 6.0-25.0 Slabs (aluminum plate) 25-200 200 or more thick plate

Aluminium foil, often referred to with the misnomer tin foil, is aluminium prepared in thin metal leaves with a thickness less than 0.2 mm; thinner gauges down to 6 micrometres are also commonly used. In the United States, foils are commonly gauged in thousandths of an inch or mils. Standard household foil is typically 0.016 mm thick, and heavy duty household foil is typically 0.024 mm. The foil is pliable, and can be readily bent or wrapped around objects. Thin foils are fragile and are sometimes laminated to other materials such as plastics or paper to make them more useful. Aluminium foil supplanted tin foil in the mid 20th century. Annual production of aluminium foil was approximately 800,000 tonnes (880,000 tons) in Europe and 600,000 tonnes in the U.S. in 2003. Approximately 75% of aluminium foil is used for packaging of foods, cosmetics, and chemical products, and 25% used for industrial applications (e.g. thermal insulation, cables and electronics). In North America, aluminium foil is known as aluminum foil. It was popularized by Reynolds Metals, the leading manufacturer in North America. In the United Kingdom and United States it is, informally, widely called tin foil, for historical reasons (similar to how aluminium cans are often still called "tin cans"). Metallised films are sometimes mistaken for aluminium foil, but are actually polymer films coated with a thin layer of aluminium. In Australia, aluminium foil is widely called alfoil. https://en.wikipedia.org/wiki/Aluminium_foil