galvanized steel coil

Galvanized coil, the steel sheet was immersed in molten zinc bath to the surface adhesion layer of zinc sheet steel. At present, continuous galvanizing production process, that is continuously rolled steel sheet was immersed in a molten zinc plating bath made of galvanized steel; galvannealed steel sheet. This plate is manufactured by hot dipping, but after the tank, immediately put it heated to about 500 ℃, it generates zinc and iron alloy coating. This galvanized coil has good paint adhesion and weldability.

Passivation
Fold produce corrosion (white rust) galvanized layer through the passivation treatment, can reduce the influx of warm storage conditions. However, this anti-corrosive chemical treatment can be limited, and, most coatings prevent adhesion. This treatment is generally not used in zinc-iron alloy coating, in addition to finishing the surface, as a routine, the production plant to other types of galvanizing layer are passivated.

Oiler
Oiled to reduce rusting steel storage under humid conditions, passivated steel sheet and strip and then cover the treated oil will further reduce corrosion under humid storage conditions. Oil should be able to be removed without damaging the zinc layer with a degreasing agent.

Paint seal
Through the transparent film coated with a thin organic coating, can provide an additional corrosion protection, especially fingerprint-resistant properties. During molding can improve lubrication and as an adhesion layer for subsequent coating.

Phosphate
By phosphate processing, the various types of galvanized steel plating, in addition to normal cleaning, the coating does not need further treatment. This treatment can improve adhesion and corrosion resistance of the coating, reducing the risk of corrosion during storage and transportation. After phosphating and equipped with a suitable lubricant, can improve the molding properties.

Does not deal
Only in the case who requested the order and does not deal with those responsible, according to the standard supplier of steel sheet and strip can not be passivated or oiled or lacquer seal or phosphate, and other surface treatment.