Hot-dip galvanized pipes are created through a reaction between molten metal and the iron substrate, resulting in an alloy layer that combines both the substrate and the coating. The process begins with acid washing the steel pipe to remove surface oxides, followed by cleaning in a bath of ammonium chloride or zinc chloride solution, or a mixture of both. Subsequently, the pipe is immersed in a hot-dip galvanizing bath. Hot-dip galvanized pipes offer benefits such as even coating, strong adhesion, and long service life. The substrate of hot-dip galvanized steel pipes undergoes complex physical and chemical reactions with the molten coating solution, forming a tightly structured, corrosion-resistant zinc-iron alloy layer. This alloy layer merges with the pure zinc layer and the steel pipe substrate, thereby enhancing its corrosion resistance.