The difference between galvanized pipe and galvanized strip pipe

In order to improve the corrosion resistance of steel pipes, general steel pipes (seamless pipes or welded pipes) are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electric galvanizing. The hot-dip galvanizing layer is thick, the cost of electric galvanizing is low, and the surface is not very smooth.

1. Galvanized pipe structure:

Galvanized strip pipe has adjusted the production process of hot-dip galvanized pipe. The steel strip used for pipe making is first pickled, in order to remove the iron oxide on the surface of the steel strip, after pickling, it is cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride. Then into the hot-dip coating tank. It is then air-dried and made into tubes. The coating is uniform and bright, and the amount of galvanizing is very small, which is lower than the cost of producing hot-dip galvanized pipes. Its corrosion resistance is slightly worse than that of hot-dip galvanized pipe

2. Hot-dip galvanized pipe structure:

The hot-dip galvanized pipe reacts the molten metal with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. The steel pipe is pickled first, in order to remove the iron oxide on the surface of the steel pipe. After pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot-dip coating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Therefore, it has strong corrosion resistance.

3. The difference between galvanized strip pipe and hot-dip galvanized pipe:

Galvanized strip pipe:

(1) The color galvanized pipe is a bit blue, and the weight is 6 meters long and 5.5 kg (the corrosion resistance is stronger and the service life is shorter than that of hot-dip galvanized steel pipe, and the price is low and economical).

(2) The galvanized strip tube is shiny white and reflective, with few snowflakes, and the two ports are clean and free of zinc tumors.

Hot-dip galvanized pipe:

(1) The color of the hot-dip galvanized pipe is a bit whitish, and the weight: 6 meters long and 6.5 kg (strong corrosion resistance, long service life, and slightly higher price).

(2) The hot-dip galvanized pipe is snow white but not shiny or reflective, with many snowflakes on the surface, and zinc nodules (coagulated zinc) at both ends.

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