What are the common problems of galvanized steel coil?

What is Galvanized Steel Coil?

Galvanized steel coil is coated with a layer of zinc on the surface of the steel plate to prevent the surface from being corroded due to external factors and prolong the service life of the steel plate.

Galvanized classification:

There are mainly electro-galvanized, hot-dip galvanized and galvanized.

Schematic diagram of galvanized coil:

What is a large spangle? What is a small spangle?

Answer: The big spangle is the normal spangle, which can be produced according to the normal production process. The diameter of the crystal nucleus is not less than 0.2mm; the diameter of the crystal nucleus is less than 0.2mm, which is called the small spangle.