For the longest service life, manganese phosphating coated steel wire rope is preferred in atmospheric environment, and hot dip galvanized-phosphating double coated steel wire rope is preferred in severe corrosive environment.
China ranks first in the world with an annual output of10.8 million tons of steel wire rope. Phosphating wire rope is a revolutionary and innovative technology in the field of wire rope in the world, and its service life (fatigue life) has greatly jumped;
1. Phosphating coated steel wire rope (patented by China), after being phosphatized by manganese or zinc-manganese series, the wear resistance and corrosion resistance of the steel wire have all jumped. In GB/T11376-1997, the wear resistance and rust resistance of phosphating film are introduced in detail, and oil permeates into the pores of phosphating film to play an extremely excellent antifriction role. It is an upgraded product of smooth steel wire rope and can be used instead of galvanized steel wire rope with thin zinc coating. At present, the fatigue life of phosphating rope is about three times that of smooth steel rope, which can be compared by fatigue test. In the future, with the in-depth study of wear-resistant phosphating solution, the service life can be greatly improved. The phosphating film is 3-60g/m2, and the phosphatized steel wire is directly twisted without drawing.
Note: Zinc phosphating for wire drawing should not be confused with manganese phosphating for rope steel wire. This technology is suitable for producing all kinds of wire ropes, such as elevator wire ropes, important wire ropes, mine wire ropes, anti-rotation wire ropes, wire ropes for oil production, wire ropes for pile drivers, etc. (Baidu Library has phosphate coated steel wire rope for free download).
2. Galvanized steel wire rope, including hot dip galvanizing and electro-galvanizing. The thicker the zinc layer of direct hot-dip galvanized steel wire, the thicker the zinc layer, the stronger the corrosion resistance, and the longer the service time, the thinner the zinc electroplating. Because phosphating film has certain corrosion resistance, manganese phosphating film steel wire rope can be used instead of some kinds of thin galvanized steel wire rope, such as high temperature environment with atmospheric environment but humid air.
3. Stainless steel wire rope, steel wire rope twisted with stainless steel wire, such as 304 or 3 16 stainless steel, has higher corrosion resistance and is more expensive than hot-dip galvanized carbon steel wire rope. Manganese phosphating coating treatment of stainless steel wire (phosphating of stainless steel wire requires special phosphating formula) can also greatly prolong its service life.
4. Plastic coated steel wire rope: on the basis of steel wire rope, the outer layer of steel wire rope or strand rope is coated with polyethylene and polypropylene.
5. Smooth steel wire rope produced in UK 1834 and China Tianjin No.1 Steel Wire Rope Factory1939 (bankrupt in 2005) will be completely eliminated with a large number of phosphating coated steel wire ropes entering the market.