What's the difference between cold-dip galvanized square pipes?

Difference between cold-dip galvanized square pipes;

1, different processing methods

Hot-dip galvanized square pipe is a square pipe made of steel plate or steel strip by crimping. On the basis of this kind of square tube, the square tube is put into a hot dip galvanizing pool and shaped after chemical reaction.

Cold galvanized square pipe is based on the principle of cold galvanizing, which makes the square pipe have anti-corrosion performance. The principle of cold galvanizing is mainly to use electrochemical principle to prevent corrosion. In the manufacturing process, it is necessary to ensure the full contact between zinc powder and steel, resulting in electrode potential difference, so the surface treatment of steel is very important.

2, the production process is different

Hot dip galvanized square pipe is mainly to put the prepared square pipe into hot dip galvanized pool for chemical reaction. The production process is simple, the production efficiency is high, there are many varieties and specifications, and the equipment resources are few, but the strength is generally lower than that of seamless square pipe.

Cold galvanized square pipes are divided into coating cold galvanizing and electroplating cold galvanizing according to the process. Coating cold galvanizing is a process of forming a coating with metal zinc on the surface of square pipe by using zinc coating, which can isolate the contact between square pipe and the outside world and avoid the corrosion of square pipe. Galvanizing mainly uses electrolysis to form a uniform, dense and well-bonded zinc coating on the surface of parts.

3. Different uses

Because of its excellent performance, hot-dip galvanized square pipe is often used in glass curtain wall, power tower, communication power grid, water and gas transmission, wire casing, houses, bridges, metal structures, power transmission and so on.

The main application fields of cold galvanized pipe are construction, machinery manufacturing, steel structure engineering, shipbuilding, solar power generation bracket, steel structure engineering, electric power engineering, power plant, agricultural and chemical machinery, glass curtain wall, automobile chassis, airport, boiler construction, highway railing, housing construction and so on.

Baidu encyclopedia-galvanized square tube