Galvanized steel coil, the thin steel plate is dipped in the molten zinc tank, so that the surface of the thin steel plate is adhered with a layer of zinc. At present, the continuous galvanizing process is mainly used for production, that is, the coiled steel plates are continuously dipped in a galvanizing tank with molten zinc to make galvanized steel plates; alloyed galvanized steel plates. This kind of steel panel is also made by hot dip method, but it is heated to about 500℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This galvanized steel coil has good paint adhesion and weldability.
However, galvanized steel coil also has many defects, mainly including: shedding, scratches, passivation spots, zinc particles, thick edges, air knife streaks, air knife scratches, exposed steel, inclusions, mechanical damage, poor performance of steel base .
Galvanized steel coil products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. Among them, the construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grids, etc.; the light industry industry uses it to manufacture home appliance shells, civil chimneys, kitchen utensils, etc., and the automobile industry is mainly used to manufacture corrosion-resistant parts of cars, etc. ; Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, frozen meat and aquatic products, etc.; commercial is mainly used for storage and transportation of materials, packaging equipment, etc.
During the normal solidification process of the zinc layer, the zinc grains grow freely and form a coating with obvious spangle morphology.
During the solidification process of the zinc layer, the zinc grains are artificially restricted to form a spangle coating as small as possible.
By adjusting the chemical composition of the plating solution, there is no visible spangle morphology and a uniform coating on the surface.
Heat treatment is carried out on the steel strip after passing through the galvanizing bath, so that the entire coating forms an alloy layer of zinc and iron. The appearance of this coating is dark gray, without metallic luster, and it is easy to pulverize during the violent forming process. Except for cleaning, coatings that can be painted directly without further treatment.
Skin pass is a cold rolling process with a small amount of deformation on galvanized steel sheets for one or more of the following purposes.
Improve the surface appearance of galvanized steel coil or be suitable for decorative coating; temporarily minimize the phenomenon of slip line (Lüders line) or crease when the finished product is not processed.
The above introduces Properties and applications of galvanized steel coil and Plating definition. Interested friends can continue to pay attention to Excellent galvanized steel coil supplier Shanghai Bao New Group. Here we will continue to give you all kinds of knowledge about steel.
