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Surface treatment of Suzhou aluminum coil

Date: 2019-05-18 09:13
Mingtai aluminum coils require some pre-treatment to ensure that the aluminum roll surface is clean before rolling. In order to avoid residual grease and lubricant on the surface, it will affect the coating and use. Therefore, Mingtai aluminum coils are pretreated according to the following aspects before molding.
Surface treatment of Mingtai aluminum coil
First, you can wash Mingtai aluminum coils with hot water. The hot water cleaning mainly cleans the degreaser remaining on the surface of the substrate to ensure that these residues can be dissolved to prevent secondary decontamination of the substrate. The method of use is mainly the method of dipping and spraying. The water quality used should not be too high. Otherwise, minerals in the water will form spots on the surface of the substrate. Second, hot alkali degreasing is faster because the precoat line is faster, so the degreasing agent used is usually at a higher concentration. Typical degreasers include sodium hydroxide (NaOH), sodium carbonate (Na2Co3), water glass (Na2SiO3), phosphates, and the like. The hot alkaline degreasing process is usually carried out in two steps to ensure that the surface of the Mint aluminum coil is cleaned and sprayed.
Mingtai aluminum coil passivation treatment is carried out by pressure spraying, dip coating or roll coating on the surface of the substrate to form a conversion film. Generally, a method of pressurized injection is used, and sludge generated by the passivating liquid during use tends to block the injection holes, thereby affecting the effect of the injection. Although the dip coating method solves this problem, the passivation liquid is consumed in a large amount. Both of the above methods require the washing of excess passivation solution with water in practice, which will result in the recovery and purification of the wastewater. Roll coating is a passivation construction method, which has the advantages of uniform coating, economical utility, and no need for impregnation. Mingtai aluminum coils typically use a chromate/oxide type treatment containing chromate, chromic acid, phosphoric acid and promoter fluorides and molybdates. Phosphoric acid must be added to this type of treatment, otherwise it cannot be used to process aluminum coils for food and beverages.
Mingtai aluminum coils are packaged in electronic equipment, machinery and other applications. In the past 2012, many traditional electronic products and equipment are still plastic, the price may be cheaper, but the life is short, the shell is easy to break, so the future development of aluminum coil can also occupy a place in the market.
The above is a brief description of the surface treatment work of Mingtai Aluminum Coil. The company is a global large-scale modern aluminum processing enterprise integrating scientific research, processing and manufacturing. The company is committed to transportation, mechanical equipment and power engineering. Lightweight development. If you need to buy a product, please call our company.
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