Prime quality cold-rolled steelrefers to a high-quality steel product that has been processed through a cold rolling process.Cold rolling is a method of forming steel at room temperature by passing it through a series of rollers to reduce its thickness and improve its strength and durability.

Hot-dip galvanizing is a process of coating steel with a layer of zinc to protect it from corrosion. The process involves immersing the steel in a bath of molten zinc at a temperature of around 450°C, which results in a metallurgically bonded coating that is highly resistant to corrosion.

Galvanized coil, a thin steel sheet that is dipped in a bath of molten zinc to adhere a layer of zinc to its surface. It is mainly produced by the continuous galvanizing process, that is, the coiled steel plate is continuously dipped in the galvanizing tank with molten zinc to make galvanized steel plate; alloyed galvanized steel plate. This kind of steel panel is also made by hot dip method, but it is heated to about 500℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This galvanized coil has good paint adhesion and weldability.