Galvanized steel is generally covered with a zinc layer on the surface of the steel plate to prevent corrosion. However, in some places with high humidity and humid climates, the protective ability of the zinc layer may be damaged, resulting in the formation of white zinc oxide on the surface, which is the cause of white rust.
1. High air humidity
2. Low oxygen content in the air, such as a high proportion of acidic gases in the environment
3. Direct contact with other metals
4. Packaging when drying is not thorough
5. Mechanical damage caused by storage extrusion.

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