Galvanized coil, the thin steel plate is dipped into the melted zinc tank, so that its surface adheres to a layer of zinc thin steel plate.  It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously dipped in the plating tank with melted zinc to make galvanized steel plate.  Alloyed galvanized steel sheet.  This steel plate is also made by hot dipping, but immediately after the tank is heated to about 500 ° C, so that it generates an alloy coating of zinc and iron.  This galvanized coil has good coating adhesion and weldability. 

Finally, it's a roll.  After cooling, the galvanized steel coil is rewound and the quality is checked.  The quality test mainly includes the checking of coating thickness, coating adhesion, coating uniformity and so on.
These are the main steps of the galvanized coil production process, each step is very critical. It plays an important role in the quality of the final galvanized coil and at the same time in the production process，It is also necessary to pay attention to issues such as environmental protection and production safety to ensure the stable progress of the process  

Use of galvanized coil

The uses of galvanized rolls are as follows: A large number of galvanized thin rolls are used in automotive manufacturing, refrigerated containers, construction, ventilation and heating facilities, and furniture manufacturing.  Galvanizing has become an important method of steel corrosion protection, not only because zinc can form a dense protective layer on the surface of the steel, but also because zinc has a cathodic protection effect, when the galvanizing layer is damaged, it can still prevent the corrosion of the iron base material by cathodic protection.  Construction industry: roof, roof components, balcony rolls, window sills, newsstands, warehouses, rolling doors, heaters, rainwater pipes and other household appliances: refrigerators, washing machines, switch cabinets, air conditioners, microwave ovens, bread makers, copiers, vending machines, electric fans, vacuum cleaners and other furniture industry:  Lampshade, wardrobe, table, bookshelf, counter, signboard, medical equipment and other transportation industry: automobile sky roll, car shell, carriage roll, tractor, tram, container, highway wall, ship bulkhead roll and other aspects:  Musical instrument shell, dustbin, billboard, clock, photographic equipment, meter and other color coated steel coil is hot galvanized coil, hot plated aluminum zinc coil, electric galvanized coil and so on as the base coil, after surface pretreatment.  Of course,when making galvanized rolls, it must first be passivated to be able to carry out the second step of oiling, and finally paint sealing and phosphating.  The galvanized roll produced after a long step is very durable, of course, if the user does not need phosphating, this step can be omitted in the production  process.