Hot dip galvanizing is a popular process used to protect steel pipes from corrosion. This process involves dipping steel pipes in a bath of molten zinc to create a protective coating that prevents rust and other forms of corrosion. The resulting galvanized steel pipes are strong, durable and long-lasting.→CLICK FOR MORE DETAILS
black pipe inspection — degrease（脱油）— rinsing（冲水 残渣） — pickling（酸洗） — water cleaning（水洗） — solvent coating（可溶包衣） — drying by hot air（热风干） — Hot Dipped Galvanizing— water cooling（水冷） — passivation（钝化） & rinsing — cleaning — drying — inspection and repair — marking, packing and storage
1)cleaning the steel pipes to remove any oil, grease, or other contaminants, because any impurities on the steel surface can affect the adhesion of the zinc coating. Typically, the pipes are cleaned with a chemical solution to ensure they are free of contaminants.
2)dipped in a bath of molten zinc at a temperature of around 450°C. The zinc coating adheres to the steel surface and creates a protective layer that prevents corrosion. The thickness of the zinc coating depends on the application of the steel pipes. Pipes used in harsh environments require a thicker zinc coating.
3)cooled in air or water,it sets the zinc coating and helps to ensure its durability. After cooling, the pipes are inspected for any defects or inconsistencies in the coating. Any defects are addressed before the pipes are shipped to customers.
