Meaning: When the parts require a longer period of storage and transportation, the deal between the passivation treatment to prevent corrosion during storage and transportation process. The corrosion products are often referred to as white rust. Common passivation methods are chromate and phosphate method.
1, passivation method using hot dip galvanized pipe directly above the runway spray passivation solution, sprayed in the distance from the location of one meter by the steam knife to wipe the net with the liquid, pay attention must be blown net.
2, the use of compressed air wipe, blow off the surface of the steel pipe with the liquid and make the coating uniform. By adjusting the pressure to adjust the thickness of the coating, must not have excess liquid beads attached to the surface of the zinc tube.
