Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Yes, die-cast zinc will oxidize in air, but this is typically a slow and protective process. When exposed to air, zinc reacts with oxygen to form a thin, stable layer of zinc oxide on its surface. This layer acts as a barrier, preventing further oxidation or corrosion in most environments. In humid or polluted air, it may also form zinc carbonate, further enhancing protection. Unlike iron rusting, this oxidation doesn’t degrade the material significantly. Harsh conditions (e.g., salty or acidic air) can accelerate oxidation, potentially leading to white powdery corrosion ("white rust"), but die-cast zinc generally holds up well. Coatings like chromate or paint can minimize this even further.