The leveling and bright process of aluminum
profile includes alkali etching process, acid etching process and polishing process. Although each has its own characteristics, its shortcomings are also prominent, such as high aluminum consumption in alkali etching, more alkali slag, and low work efficiency; acid etching fluoride pollution, profile Darkness; serious polishing pollution, high cost, etc. These processes either pollute the environment, waste aluminum resources, or reduce the surface quality of aluminum materials, and process improvements are urgently needed. Tell everyone about the characteristics of these processes as follows: (1). Alkaline etching process: It consists of degreasing water washing, alkali etching water washing, light water washing, water washing and oxidation, that is, after the profile is degreasing, the machine is removed by alkali etching in the alkali etching tank. Texture and natural oxide film, sanding, and then through the light slot to remove the surface black ash, then anodizing can be carried out. The core process of the process is alkaline etching, and the surface flatness of the profile and the quality of sanding are all determined by this process. In order to achieve the purpose of leveling the mechanical pattern, it generally takes 12-15 minutes of alkali etching, the aluminum consumption reaches 40-50Kg/T, and the alkali consumption reaches 50Kg/T. Such high aluminum consumption not only wastes resources, but also brings serious environmental problems and increases wastewater treatment costs. This process has been used for more than 100 years, and it has been used in most aluminum factories around the world until it was gradually replaced by acid etching in the past two years. (2) Acid etching process: It is composed of degreasing water washing acid etching water washing water washing alkali etching water washing water washing out light water washing water washing and oxidation. After degreasing, the profile is first etched by acid, then etched by alkali, and the pre-treatment is completed. The core process of the process is acid etching, and the removal of mechanical lines and sanding are all determined by acid etching. Different from alkaline etching, the advantages of acid etching are strong ability to remove mechanical lines, fast sanding, and low aluminum consumption. Generally, it can be completed in 3-5 minutes, and the aluminum consumption is almost 1/8-1/6 of alkaline etching. From the perspective of efficiency and resource conservation, acid etching is undoubtedly a major advancement in alkaline etching technology. However, the environmental protection problems of acid etching are more prominent: the toxic gas HF escapes from the acid tank and the pollution of the washing tank Fˉ. Fluoride is generally highly toxic, making it more difficult to handle. In addition, after the acid etching treatment, the appearance of the profile becomes black and dark. Although the alkali etching and light emission have to be continued, it can be brightened, but it is still very dark. It not only increases the process but also loses the gloss. These problems have not been effective yet. solution. (3) Polishing process: it consists of degreasing water washing, polishing water washing and washing, the profile is put into the polishing tank after degreasing, after 2-5 minutes polishing, it can form a mirror surface, and it can be directly oxidized after washing. The core process of this process is polishing, and the grain removal and mirror surface are all completed in the polishing groove. Polishing has the advantages of low aluminum consumption and bright profiles, but the escape of NOx from the polishing tank causes serious environmental pollution and physical injury to the operators. At the same time, factors such as the cost of expensive chemical raw materials also restrict the promotion of this process.
This is an internationally recognized standard which acts as a form of guarantee that everything Zeyi Aluminum Co., Ltd. does is managed to the highest quality standards.
Zeyi Aluminum Co., Ltd. is committed to attracting, developing, and keeping a diverse work force that reflects the nature of our global business.
custom aluminium extrusion allows users to use in innovative ways that fit their individual needs, while at the same time providing cost-effective, reliable and user-friendly products.
Zeyi provides a number of aluminum extrusion rail designed to handle aluminum window profile manufacturers.
Zeyi Aluminum Co., Ltd. provides the ideal conditions for business creation – access to cash, human capital and affordable office space, for instance – can help new ventures not only take off but also thrive.