What is galvanized square tube galvanized tube specification sheet

For those friends who are not familiar with building materials, they may not understand what is a galvanized square tube . The emergence of galvanized square tubes has brought us convenience, but with the development of the times, galvanized square tubes have gradually been eliminated. Fade out the stage of history. The following small series will introduce to you what is the galvanized square tube and galvanized tube specification sheet.

What is a galvanized square tube

The galvanized square tube is a hollow square section steel tube with a square cross-section shape made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil blanks after the cold bending forming and then high-frequency welding Or the galvanized square moment tube made of cold-formed hollow steel tubes and then hot dip galvanized.

Cold galvanized square tube

Cold-galvanized square tube is electro-galvanized, and the amount of zinc plating is very small, only 10-50g/m2, and its corrosion resistance is much worse than that of hot-dipped galvanized steel tube. In order to ensure quality, regular galvanized pipe manufacturers generally do not use electroplating zinc. Only small enterprises with small scale and outdated equipment will use electroplated zinc, and their prices are naturally cheaper. The galvanized layer of the cold galvanized steel pipe is a plating layer, and the zinc layer and the square pipe substrate are layered independently. The zinc layer is thin and simply adheres to the steel pipe substrate, and it is relatively easy to fall off, and its corrosion resistance is poor. The Ministry of Construction has long formally adopted the following, and we must eliminate the use of cold-galvanized square pipes that are outdated in technology as water and gas pipes. In new houses, it is also strictly prohibited to use cold galvanized square pipes as water supply pipes.

Hot-Dip Galvanized square tube

The hot-dip galvanized square tube is an alloy layer produced by reacting a molten metal with an iron matrix, thereby combining the matrix and the plating layer. Hot-dip galvanizing is to first pickle the square tube, remove the iron oxide on the surface of the square tube, and after pickling, send it to an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride for cleaning, and then send it. Into the hot dip tank. Hot-dip galvanizing has the advantages of uniform plating, strong adhesion and long service life. The Hot Dip Galvanized Square Tube substrate and the molten bath solution undergo complex physical and chemical reactions to form a corrosion-resistant and compact zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the square tube body, and has strong corrosion resistance.

Galvanized tube specification sheet

Editor's summary: The specifications for what is a galvanized square tube and galvanized tube are introduced here. For more information, you can follow this site information.