Hot-dip galvanized steel pipe has the characteristics of surface luster, uniform zinc layer, no leakage plating, no dripping, strong adhesion to break the net legion, strong corrosion resistance, in the suburban environment, the standard hot-dip galvanized rust prevention thickness can be maintained for more than 50 years without repair; In urban or offshore areas, the standard hot-dip galvanized rust prevention layer can be maintained for 20 years without repair.

Galvanized pipe, also known as galvanized steel pipe, is a pipe product that is coated with a layer of metallic zinc on the surface of ordinary steel pipes.
The main purpose of galvanized pipe is to prevent corrosion and rust, thereby extending the service life of the steel pipe. Galvanized pipes are divided into two types: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thicker, uniform coating and strong adhesion, while electro-galvanizing has a lower cost and a smoother surface.

In order to improve the corrosion resistance of steel pipes, general steel pipes are galvanized. Galvanized welded pipe is divided into hot galvanizing and cold galvanizing. Cold galvanizing is generally used less. Hot dip galvanized pipe is to make molten metal react with iron substrate to produce alloy layer, so that the substrate and coating can be combined. Hot galvanizing refers to pickling the steel pipe first. In order to remove iron oxide on the steel pipe surface, after pickling, the steel pipe is cleaned in ammonium chloride or zinc chloride aqueous solution or mixed ammonium chloride and zinc chloride aqueous solution tank, and then sent to the hot dip tank. Hot dip galvanizing has the advantages of even coating, strong adhesion and long service life.