Galvanized coil is mainly used in light industry, commodity packaging, home appliance industry, agriculture, animal husbandry and fishery. In the 1990s, especially in recent years, with the rapid development of the national economy and the continuous improvement of people's living standards, the consumption structure has undergone fundamental changes. For example, the prosperity of the construction industry, the annual increase of car production, and the wide popularization of household appliances are inseparable from galvanized sheet, which greatly increases the market demand for galvanized sheet.
By the construction, home appliances, mechanical and electrical, transportation, interior decoration, office equipment and other industries. The electric circuit inside the color coated roll shall be laid in PVC pipe (slot) in an orderly and beautiful way; the electrical configuration shall meet the design requirements; the line shall be free of insulation aging and extension. It has the characteristics of pollution-free, excellent weather resistance, corrosion resistance, high processing and so on. It is widely used in construction, household appliances, transportation, packaging, mechanical processing, interior decoration, medical treatment, automobile industry and other fields. In the form of continuous development of various industries, the selection of color coated roll users are also increasing, however, with the continuous rise of manufacturers.
In the current market supply of color coated roll is also diverse, many users can not make a good choice. In the process of cold rolling, due to friction and rolling between roller and aluminum plate surface, fine aluminum oxide powder will fall off and adsorb on the surface of the aluminum plate, and the rolling oil and its associated suspended components will remain on the surface of aluminum plate, which will have adverse effects on the processing of color coated aluminum coil, coating and other finished products.
At this time, it needs to be cleaned by a special cleaning device. The amount of zinc plating is an effective method commonly used to express the thickness of zinc coating on galvanized sheet. The unit of galvanizing quantity is g / m2. The passivation treatment of zinc coating can reduce the cracking corrosion (white rust) under the condition of moisture temperature storage and transportation. However, the corrosion resistance of this chemical treatment is limited and hinders the adhesion of most coatings. This kind of treatment is not used in zinc iron alloy coating. Except for finishing the surface, the production plant passivates other types of zinc coating as a routine.