Hot-dip galvanized steel wire is a metal product manufactured from high-quality medium- or high-carbon steel through processes including pickling, phosphating, wire drawing, and hot-dip galvanizing. With a coating thickness of 45–300 microns, it features strong coating adhesion and durable corrosion resistance, capable of providing rust protection for decades in outdoor environments. Produced via either off-line or in-line annealing processes, the wire boasts a smooth surface finish combined with high tensile strength (900–2200 MPa), toughness, and elasticity.
This material is widely used in highly corrosive applications-such as telecommunication transmission lines and power cable armoring-as well as in the construction sector for greenhouse supports, highway guardrails, steel wire ropes, and spring components. Compared to the cold galvanizing process (which yields a coating of 3–15 microns), hot-dip galvanizing produces a thicker coating that forms an interdiffusion layer with the base metal; while production costs are higher, the process has a lower environmental impact and is better suited for applications requiring protection against long-term exposure to harsh environments.
