A large amount of white rust may appear on the surface of galvanized parts, but the actual corrosion of the coating is relatively mild. In most cases, the appearance of white rust does not indicate that the plating layer is severely damaged or it does not necessarily mean that the service life of the plating part will be reduced. After the white rust occurs, the plating should be put away to make their surface dry quickly.
The typical white and gray corrosion products on the long -storage and white rust of the white rust may become black. When this happens, as long as the zinc layer is thick enough, it will not affect the service life in GB/T13912-2020 that as long as the thickness of the coating is greater than the specified value, the surface of the plating parts is allowed to have dark or light gray color uneven areas. Essence The galvanized tools stored under humid conditions are allowed to exist on the surface (white or gray corrosion products mainly based on alkaline zinc oxide).
