Steel pipes are used to transport gas and heating in daily life. In order to improve the corrosion resistance of these steel pipes, the steel pipes will be galvanized. Galvanized steel pipes are divided into hot-dip galvanizing and electro galvanizing, in which the hot-dip galvanizing layer is thick and the quality is better. The cost of electro galvanizing is low, but the surface is not very smooth.
Introduction to hot dip galvanized pipe:
1. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Hot dip galvanized pipe is to make molten metal react with iron matrix to produce alloy layer, so as to combine the matrix and coating. Hot dip galvanizing is to pickle the steel pipe first. In order to remove iron oxide on the surface of the steel pipe, after pickling, it is cleaned in ammonium chloride, zinc chloride aqueous solution, ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip galvanizing tank.
2. Hot dip galvanized pipe has strong corrosion resistance. Complex physical and chemical reactions occur between the steel pipe matrix and the molten plating solution to form a corrosion-resistant zinc ferroalloy layer with compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix.
Production steps of hot dip galvanized pipe:
Black parts inspection → hanging → degreasing → rinsing → pickling → cleaning → dipping plating aid → hot air drying → hot dip galvanizing → cooling → passivation and rinsing → unloading → inspection and finishing → packaging, warehousing and transportation.
Post time: Dec-29-2021