The main difference between hot-dip galvanized square tubes and cold-dip galvanized square tubes is the production process. In addition, there are also certain differences in appearance, use, price, etc.
1. Different appearance
The appearance of cold-dip galvanized square tubes is relatively smooth and bright. The electroplated layer using white passivation process is bluish white or white with green light. The coating of white passivation process is slightly colorful when it is at a certain angle with the sunlight. Compared with cold-dip galvanized square tubes, the appearance of hot-dip galvanized square tubes is rougher and silver-white. The appearance is prone to process water marks and a few drips, especially at one end of the workpiece.
2. Different anti-corrosion properties
Compared with hot-dip galvanized pipes, cold-dip galvanized pipes have worse corrosion resistance. The corrosion resistance of hot-dip galvanized pipes is dozens of times that of cold-dip galvanized pipes.
3. Different uses
Hot-dip galvanized square and rectangular tubes are mainly used in curtain walls, construction, machinery manufacturing, solar power generation brackets, steel structure engineering, etc., especially in curtain walls and buildings widely used; cold-dip galvanized square and rectangular tubes are characterized by high strength and light structure. Mainly used in general occasions.
4. Different prices
With the same thickness and size, hot-dip galvanizing is more expensive than cold-dip galvanizing. This is because cold-dip galvanized square pipes only need to be plated on one side. Hot-dip galvanized square tubes require the entire square tube to be galvanized, so the production cost of cold-dip galvanized square tubes is naturally lower.
Although the difference between hot-dip galvanized square tubes and cold-dip galvanized square tubes is relatively large, there is actually no good or bad distinction between the two. You can choose the appropriate square rectangular tube mainly based on actual needs.

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