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Galvanized steel coil: A metal material that forms a zinc-iron alloy protective layer by coating a layer of zinc metal on the surface of a low-carbon steel substrate to prevent steel corrosion. Its core value is that the sacrificial anode characteristics of zinc preferentially oxidize, protect the steel substrate, and significantly extend the service life. It is suitable for scenes exposed to humid or corrosive environments.
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Cold-rolled steel coils are steel products that have undergone a cold rolling process. Cold rolling is a manufacturing process in which hot-rolled steel is passed through rollers at room temperature, compressing and shaping it into thinner and more precise coils.
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Hot-rolled steel coil: A steel product formed by continuously rolling and curling a steel billet through a rolling mill at high temperature (usually above 1100°C). Its process characteristics determine that its surface is rough and its dimensional tolerance is large, but it has the advantages of high strength and low cost. Its core value is that it is an industrial basic material and is widely used in scenarios that require low surface quality but high load-bearing capacity, such as building structures, machinery manufacturing, etc.
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Color-coated steel coils use cold-rolled steel coils, galvanized steel coils or galvanized steel coils as substrates. After surface pretreatment (cleaning, chemical conversion), one or more layers of organic coatings (such as polyester, fluorocarbon, silicon-modified polyester, etc.) are applied on the surface through a continuous coating process, and then baked and cured to form a composite material with color and functionality. Its core value combines the strength of steel with the corrosion resistance and decorativeness of the coating, and is widely used in the fields of construction, home appliances, etc.
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