Because iron sheets are prone to chemical reactions in various environments, causing corrosion and rusting. Zinc hardly changes in dry air. In humid air, a dense alkaline zinc carbonate film forms on the surface of zinc. Spiral ducts are mainly coated with a layer of zinc on the iron sheet of the duct to provide protection for the iron sheet. After passivation treatment, dyeing or coating with light protectants, the protective and decorative properties of zinc coatings can be significantly improved.

Ducts have the following characteristics:

1. Smooth appearance, no zinc nodules or burrs, silver white in color;

2. Convenient device with few connection points;

3. Low ventilation resistance and low ventilation noise;

4. Good strength and rigidity;

5. The thickness is controllable and can be freely selected within 5-107 μ m;

6. No hydrogen embrittlement, no temperature hazards, and can ensure that the mechanical properties of the data remain unchanged;

7. Can replace some processes that require hot-dip galvanizing;

8. Good corrosion resistance, with a neutral salt spray test lasting up to 240 hours;

9. Completed by hot-dip galvanizing method, suitable for various strong corrosive environments such as strong acid, alkali mist, etc;

10. We can design and customize various specifications of air ducts according to customer requirements.

Article source: Aluminum foil cigarette tube manufacturerwww.zsboeryuan.com