Galvanized steel sheet duct material exhibits several distinct combinations of properties. In terms of corrosion resistance, it far surpasses ordinary steel sheet. The zinc layer forms a thin film of basic zinc carbonate in the air; this film has a dense structure and is poorly soluble in water, further preventing the continued oxidation of the internal metal. This gives the duct a longer service life when transporting ordinary air or in industrial environments containing certain humidity and mildly corrosive gases.
Galvanized steel sheet achieves a balance between mechanical and processing properties. Its base is steel sheet with a certain strength and rigidity, ensuring that the duct, after being made into rectangular or circular shapes, can withstand certain internal and external pressures, maintaining structural stability and resisting deformation. The galvanized layer has a certain degree of ductility, preventing large-area cracking or peeling during bending, seaming, and welding processes, ensuring the integrity of the protective layer of the finished duct.
Surface properties are also an important factor. The smooth surface of galvanized steel sheets and the fine zinc layer crystals bring two direct benefits: first, the flow resistance inside the duct is relatively small, which is conducive to the smooth transport of air and can reduce the energy consumption of the system to a certain extent; second, the smooth surface does not easily accumulate dust, making it easy to clean and maintain daily, which helps to maintain the air quality of the ventilation system.
