Wire Rope Classification By Surface Condition

1. Phosphate-coated steel wire rope, also known as phosphated steel wire rope, features a phosphate coating weighing 3-60 grams per square meter. After phosphate coating, the wire is directly twisted into strands, cores, and ropes without cold drawing. The phosphate coating improves the surface wear and corrosion resistance of the rope wire and effectively suppresses fretting fatigue. Manganese or zinc-manganese phosphates are preferred for phosphated wire ropes. After phosphate coating, the wire is directly twisted into ropes without drawing. Because the phosphate coating enhances wear resistance and the non-conductive nature of the phosphate coating also improves corrosion resistance, the service life of phosphated wire ropes is 2-3 times that of smooth-coated wire ropes, significantly enhancing fatigue resistance. Phosphated wire ropes are not only an ideal alternative to smooth-coated wire ropes, but are also fully capable of replacing imported wire ropes.
2. Galvanized steel wire rope: This can be produced by hot-dip galvanizing or electrogalvanizing. The zinc coating provides anodic protection for the steel wire, and the thicker the zinc coating, the stronger its corrosion resistance.
3. Plastic-coated steel wire rope: The outer surface of the wire rope or strands is coated with a certain thickness of plastic, such as polyethylene, polypropylene, or polyurethane.
4. Smooth steel wire rope: This is produced by cold-drawing raw materials that have undergone heat treatment and surface preparation. The wire is then twisted into strands, a steel core, and finally a wire rope without any surface treatment. Production began abroad in 1834, and in China in 1939 at the Tianjin First Steel Rope Factory.