commonly used steel wire ropes for lifting equipment include phosphating coated steel wire ropes, galvanized steel wire ropes, stainless steel wire ropes or plastic coated steel wire ropes. The service life of manganese phosphating coated steel wire rope produced by patented technology is the longest. Manganese phosphating coating can greatly improve the wear resistance and corrosion resistance of steel wire rope surface. The fatigue life of phosphating coated steel wire rope is 3-4 times that of smooth steel wire rope, up to 5 times. With the research on wear-resistant phosphating solution, there is still the possibility of further improvement. According to the current market price of phosphating coated steel wire rope, the daily average service cost of phosphating coated steel wire rope is only about 3% of that of smooth steel wire rope. Phosphating coated steel wire rope is an upgraded product of smooth steel wire rope, and smooth steel wire rope is an obsolete product for reference only.