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Product Description
Galvanized coil is a thin steel plate with a layer of zinc adhered to the surface by immersing the thin steel plate in a molten zinc bath. Galvanized coils can be divided into hot-rolled galvanized coils and cold-rolled hot-dip galvanized coils, which are mainly used in construction, home appliances, automobiles, containers, transportation and household industries. Especially steel structure construction, automobile manufacturing, steel silo manufacturing and other industries.
Advantages of galvanized steel strip
1, corrosion resistance: galvanized steel belt has good corrosion resistance, neutral salt spray test up to 240 hours.
2, beautiful appearance: galvanized steel strip appearance is smooth, no zinc nodules and burrs, silver white.
3, keep the characteristics of steel: galvanized without hydrogen embrittlement, no temperature harm, can ensure the mechanical properties of the material unchanged.
Large quantities of thin galvanized coils are used in automotive manufacturing, reefer containers, the construction industry, ventilation and heating installations, and furniture manufacturing. Galvanizing has become an important anti-corrosion method for steel, not only because zinc can form a dense protective layer on the surface of steel, but also because zinc has a cathodic protection effect. When the galvanized layer is damaged, it can still prevent the iron matrix through cathodic protection material corrosion.
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Galvanized Coil Coating:
(1) Normal spangle coating
During the normal solidification process of the zinc layer, the zinc grains grow freely and form a coating with an obvious spangle shape.
(2) Minimized spangle coating
During the solidification process of the zinc layer, the zinc grains are artificially restricted to form the smallest possible spangle coating.
(3) Zinc-free coating
The coating obtained by adjusting the chemical composition of the plating solution has no visible spangle morphology and a uniform surface.
(4) Zinc-iron alloy coating
Heat treatment of the steel strip after passing through the galvanizing bath to form an alloy layer of zinc and iron throughout the coating. A coating that can be painted directly without further treatment other than cleaning.
(5) Differential thickness coating
For both sides of galvanized steel sheet, coatings with different zinc layer weights are required.
(6) Smoothing
Skin-passing is a cold-rolling process performed on galvanized steel sheets with a small amount of deformation for one or more of the following purposes.
Improve the surface appearance of galvanized steel sheet or be suitable for decorative coating; make the finished product not see the phenomenon of slip line (Lydes line) or crease during processing to minimize temporarily, etc.
Applications
Galvanized sheet (coil) strip 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 grilles, etc.; the light industry industry uses it to manufacture household appliance shells, civil chimneys, kitchen utensils, etc., and the automotive industry is mainly used to manufacture corrosion-resistant parts for cars, etc. ; Agriculture, animal husbandry and fishery are mainly used for food storage and transportation, meat and aquatic products freezing processing tools, etc.;
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