The galvanized square pipe is a hollow square-shaped hollow shape that can be cold rolled and hot rolled with two different galvanized strip plates of steel or galvanized coils. Square section steel pipe. It can also be a galvanized square pipe made of cold-formed hollow steel pipes prepared in advance and then hot-dip galvanized.
So what is the difference between hot galvanized square pipe and cold galvanized square pipe?
The hot-dip galvanized square pipe includes a wet method, dry method, lead-zinc method, and redox method. The main difference between different hot-dip galvanizing methods is how to activate the surface of the pipe body to improve the quality of galvanizing after acid-leaching cleaning of the steel pipe. Dry production and redox methods are mainly used in production.
The surface of cold galvanized, that is, the galvanized zinc layer is very smooth and dense, and the structure is uniform; it has good mechanical properties and corrosion resistance; the zinc consumption is 60% to 75% lower than that of hot galvanized. Electro galvanizing is technically complicated, but this method must be used for single-sided coatings, double-sided coatings with different thicknesses on the inner and outer surface, and thin-walled zinc plating.
