Dome Guitar Pot Control Black Rotary Volume Knob With Wrench

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The Application of Aluminum Anode Oxidation Process in Industry Is Generally Classified

Aluminum and its alloys will be oxidized in the air This is well known, the natural formation of the aluminum surface of the oxide film is crystalless, it will make the aluminum surface lose the original luster, although this layer of natural oxide film will make the aluminum surface slightly passived, but it is very thin, about 4 to 5 nm, and the pore rate is large, the mechanical performance is also poor, it can not effectively prevent the atmosphere of various media to further corrosion of aluminum metal.　

The anode oxidation treatment allows the aluminum and its alloy surface to obtain a dense film layer (from tens of microns to hundreds of microns) much thicker than the natural oxide film. This layer of artificial oxidation film after the closed treatment, crystalless oxidation film into a crystalline oxide film, pores are also closed, so that the metal surface gloss can be long-term unchanged, corrosion resistance, mechanical strength have been improved, after dyeing can also obtain a decorative appearance. Because aluminum and its alloy products have many characteristics after anode oxidation, the aluminum anode oxidation process is widely used in the surface treatment of aluminum products. Applications in industry can be broadly divided into the following.　

(1) To prevent corrosion of products: due to anode oxidation resulting from the membrane layer after proper closure treatment, there is a good stability in the atmosphere. Whether from the sulfuric acid solution, oxalic acid solution or chromic acid solution in the normal process of the oxide film, its corrosion resistance is very good, such as daily aluminum pot, pot, washing machine guts and so on. The chromate oxidation method is particularly suitable for aluminum welds and riveting parts.　　

(2) Protection of a decoration: in the high transparency of the oxide film, oxide film has the characteristics of can absorb a variety of organic dyes or inorganic pigments, oxidation film can be obtained on a variety of bright colors and patterns, plus the emergence of many new processes in recent years such as a single oxidation multiple coloring, ceremonial patterns, wood patterns, oxide offset printing transfer printing, porcelain oxidation, so that the aluminum appearance is more beautiful, this color film is also decorative layer, such as the paint, such as gold, and gold, etc.　　

(3) As a hard wear layer: in sulfuric acid or oxalic acid solution can be adjusted by the anode oxidation process conditions, obtain a thick and hard film layer, the use of the film layer of holes and absorption performance to store selected oil, effectively applied to the friction of the operating conditions, at the same time with lubrication and wear-resistant characteristics, such as automobiles and tractors engine cylinders, pistons and so on.　　

(4) As an electric insulation layer: aluminum and its alloy oxide film layer has the characteristics of large resistance, the thickness of the film layer is proportional to the resistance, this characteristic as the insulation of electricity has a certain practical significance, can be used as a dielectric of capacitors, can also be used alumina leather as the outsourcing of cable, for its surface insulation layer to replace the plastic envelope and plastic clin more popular in foreign countries, film thickness is 27. At 5 m, the wear voltage is 441V. If the use of phenolic resin for membrane hole filling, its wear-resistant voltage can be increased by 2 times, in the oxalic acid solution, when the film thickness increases, you can obtain a resistance 200 s, break through the voltage of 980V of high-quality insulation, of course, use this feature in addition to the wire, can also be used for other electrical appliances and so on.　　

(5) paint, electroplating of the bottom: because the oxide film layer has porous and good adsorption capacity, with the paint film and organic film have a good binding force, can be painted bottom. The film layer with phosphate anode oxidation can be used as the base of electroplating on aluminum.　　

(6) for modern architecture: due to the introduction of aluminum alloy electrolytic coloring process, in recent years, domestic electrolytic coloring used in the construction aluminum profile is increasing, it does not have suitable architectural tones of bronze, black, red, etc., its wear resistance is better than general conventional oxidation, especially worthy of the sun resistance is very good, more than 20 years of sun exposure in the atmosphere is not color, which is incomparable with oxidation coloring method. Electrolytic coloring of aluminum profiles can not only be used for building doors and windows, with it as shop counters, shelves and so on is particularly suitable.

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