Wire ropes are classified according to surface state

1. Phosphating coated steel wire rope (Chinese patent), referred to as phosphating steel wire rope, made of steel wire phosphating film weight 3-60 g / square meter, after phosphating, the steel wire is not cold drawn before twisting, directly twisting the strand , steel core and steel wire rope, phosphating film can improve the wear resistance and corrosion resistance of the surface of the rope, effectively suppress the occurrence of fretting fatigue. The phosphating treatment of the steel wire is preferentially phosphating with manganese or Zn-manganese. After the phosphating of the steel wire, no drawing process is performed, and the phosphating steel wire is directly used to make the steel wire rope. Since the phosphating coating makes the surface of the steel wire more wear-resistant, Moreover, the phosphating film is not electrically conductive, and can simultaneously improve the corrosion resistance of the steel wire. The service life of the phosphating steel wire rope is 2-3 times that of the smooth steel wire rope, and the fatigue resistance of the steel wire rope is greatly improved. [1] Phosphating steel wire ropes are not only an ideal substitute for smooth steel wire ropes, but also fully capable of replacing imported wire ropes [2-3].

2. Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing. The protection of the galvanized layer on the steel wire is anodic protection. The thicker the galvanized layer, the stronger the corrosion resistance.

3. Plastic coated steel wire rope, coated with a certain thickness of plastic on the outer surface of the wire rope or the outer surface of the strand, including polyethylene, polypropylene, polyurethane, etc.

4. Smooth steel wire rope, the rope wire obtained after cold-drawing the raw materials after heat treatment and surface preparation (Note: the phosphating film formed during the pre-treatment process is gradually detached from the wire drawing die during the cold drawing process), the steel wire is no longer After any surface treatment, the strands, steel cores and steel wire ropes were directly smashed. The production began in 1834 in foreign countries. In 1939, the first wire rope factory in Tianjin began production.