Galvanized coil is a material produced by continuous hot-dip galvanizing process with hot-rolled steel strip or cold-rolled steel strip as the substrate. The hot-dip galvanized sheet is supplied as a rectangular flat plate after cross-cutting; the hot-dip galvanized coil is supplied as a coil after coiling.

Therefore, galvanized coils can be divided into hot-rolled galvanized coils and cold-rolled hot-dip galvanized coils. They have good coating adhesion and weldability, and can be directly processed. They have strong corrosion resistance, good surface quality, benefit from deep processing, and are economical and practical. , it provides a new type of raw materials for the construction industry, shipbuilding industry, vehicle manufacturing industry, furniture industry, electrical industry, etc., especially for steel structure construction, automobile manufacturing, steel silo manufacturing and other industries, and plays a role in replacing wood with steel and efficient construction. , Save energy, prevent pollution and other good effects.

However, in different regions and different parts of use, the service life of color-coated boards with the same amount of galvanizing, the same coating, and the same coating thickness will be very different.