How Are Hot-dip Galvanized Rectangular Steel Pipes Made?

First, the steel strip is cold-formed into a rectangular square tube, and then goes through processes such as rust removal → assist plating → hot dip galvanizing → cooling → trimming. The zinc layer will penetrate into the surface of the steel and form an alloy layer. Anti-corrosion is not simply "painting", but metal bonding, which has strong adhesion and is not easy to fall off.