Hot dip galvanizing line
Hot-dip galvanizing is a process whereby molten zinc reacts with the iron substrate to produce an alloy layer, thus combining both the substrate and the coating. The hot-dip galvanizing process starts with pickling the steel workpiece, in order to remove the iron oxide from the surface of the workpiece, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tanks, and then it is sent to hot-dip galvanizing tanks. Hot dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life.
For enhanced protection against the elements, Hot Dip Galvanizing Line incorporates a sophisticated chromatizing process. This adds an extra layer of defense, ensuring that the products are safeguarded against the harshest environmental conditions.
Introduction of hot-dip galvanizing process
Loading→degreasing→water washing→acid washing→water washing→Fluxing→drying & preheating→hot-dip galvanizing→cooling→passivation→ Drying → Inspection
Description of the process
Chemical degreasing or water-based metal degreasing cleaning agent can be used to remove oil until it is wet by water.
(2) Acid washing
It can keep the workpiece with certain activities before dip plating.
(4) Drying and preheating
Remove residual moisture to prevent zinc explosion, resulting in zinc splash.
(5) Hot-dip galvanizing
Reduce or prolong the time of white rust appearance, are passivated with chromate, such as Na2Cr2O7 80 ~ 100g / L, sulfuric acid 3 ~ 4ml / L.
Generally water cooling, but the temperature should not be too low.
The surface of the plating is bright, detailed, and free of flow hanging and wrinkled skin. The bending press can be used to bend the sample piece for 90～180°, and the hammer can also be used to knock for inspection.
Also known as zinc electroplating or zinc galvanization, this process entails applying a thin layer of zinc to the surface of a metal. The electroplating is achieved by immersing the metal part in a zinc solution and introducing an electrical current.
Tin plating is widely used for electroplating applications in a range of industries including electronics, aerospace, jewellery manufacture, but perhaps the most common application for tin plating solution is the tin cans that are widely used for storing food products.