Steel coil
3 year ago
Passivation process of galvanized steel coil:
The zinc coating can be passivated to reduce the rust (white rust) in the condition of wet storage and transportation. However, the corrosion resistance of this chemical treatment is limited and, moreover, hinders the adhesion of most coatings. This treatment is generally not in the zinc iron alloy coating, in addition to the finishing surface, as a general, the production plant on other types of galvanized layer are passivation treatment.
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