What is the difference between non-passivation and passivation of galvanized sheet?

After passivation of galvanized steel sheets, the surface layer is transformed into a state that is not easily oxidized, which can slow down the corrosion rate of metal materials, prevent rust, and thus be stored for a longer period of time, but it is not conducive to metal surface treatment. On the contrary, the meaning of non-passivation and passivation is that the surface has not been passivated and is more susceptible to corrosion, but metal surface treatment can be carried out. Passivation treatment is a way to transform the metal surface layer into a state that is not easily oxidized and slow down the corrosion rate of metal materials. In addition, a situation in which a specific metal or alloy whose chemical specificity is greatly reduced and becomes a precious metal is also called passivation. The passivation treatment of metal materials may also be a spontaneous process (such as converting a layer of refractory chemical substance, that is, a metal oxide film, on the surface of the metal material). In industrial production, passivators (mainly reducing agents) are used to passivate stainless steel to form a protective film.