What is the difference between galvanized square and rectangular pipes and ordinary welded square and rectangular tubes?

What is the difference between galvanized square and rectangular pipes and ordinary welded square and rectangular tubes?

Compared with ordinary welded square pipes, galvanized square and rectangular pipes have the following differences:
1. The external galvanized layer can protect the square and rectangular pipes from corrosion and rust.
2. The surface has high gloss and long service life, and can be used indoors and outdoors.
3. High strength, resistant to cracks and not easy to deform.
4. Commonly used in construction, transportation, petroleum, chemical industry, machinery, electricity and other fields.