Why does the color of galvanized square pipe turn white?

The main component of galvanized square pipe is zinc, which is easy to react with oxygen in the air. Why does the color of galvanized square pipe turn white? Next, let's explain it in detail.
The galvanized products should be ventilated and dry. Zinc is amphoteric metal, which is relatively active. Therefore, it is easy to corrode in general humid environment. Due to slight corrosion, the galvanized layer will also have large color difference, which will affect the appearance of the products.
As long as it can ensure good ventilation, even if it will rain, but as long as it can be dried in time, galvanized products will not have too much impact. In the warehouse, it shall not be stacked together with acid, alkali, salt, cement and other materials that are corrosive to galvanized square pipes. Galvanized square pipes of different varieties shall be stacked separately to prevent confusion and contact corrosion. They can be stored in a well ventilated shed; The warehouse shall be selected according to the geographical conditions. Generally, the general enclosed warehouse is adopted, that is, the warehouse with roof, enclosure, tight doors and windows and ventilation device; Warehouse requirements: pay attention to ventilation in sunny days, close in rainy days to prevent moisture, and always maintain a suitable storage environment.