The annual output of domestic steel wire ropes is 1.8 million tons, ranking first in the world. In the past five years, there have been a lot of patents applied for in the field of steel wire ropes. However, 99% of the patents have not been implemented. The real technological progress is the patented technology of phosphating coated steel wire ropes, because this technology greatly extends the fatigue life of steel wire ropes, and has been verified in tests by many steel wire rope factories.
Commonly used types of steel wire ropes include phosphate-coated steel wire ropes, galvanized steel wire ropes, stainless steel wire ropes or plastic-coated steel wire ropes. They are used in atmospheric environments. The manganese-based phosphate-coated steel wire ropes produced with patented technology have the longest service life. Hot-dip galvanized-phosphating double-coated steel wire ropes are preferred in heavily corrosive environments.
Phosphating coated steel wire ropes produced by patented technology give priority to manganese or zinc-manganese phosphating. Compared with the production process of smooth steel wire ropes, only the final wear-resistant phosphating treatment process is added to the rope making process. The wear resistance and corrosion resistance of the steel wire are greatly improved. After phosphating, the steel wire is cold drawn and directly twisted into a steel wire rope. Current fatigue test data shows that the fatigue life of phosphate-coated steel wire ropes is about three times that of smooth steel wire ropes with the same structure (under comparable laboratory conditions). With the research on wear-resistant phosphating formulas, there is the possibility of substantial improvement. Manganese-based phosphating is wear-resistant phosphating, which can solve the wear problem of steel wire ropes during use. Smooth steel wire ropes are being eliminated.
Because the supply of phosphate-coated steel wire ropes exceeds demand, they are currently in high demand.
The price of purchasing phosphate-coated steel wire rope is higher than that of smooth steel wire rope, but the unit use cost is lower than that of smooth steel wire rope. Current test data proves that the fatigue life of phosphate-coated steel wire ropes is three times that of smooth steel wire ropes. The service life of steel wire ropes is directly proportional to the fatigue life. According to the approximate price of the current steel wire rope market, the price of manganese-based phosphating-coated steel wire ropes is approximately 1.4-1.6 times that of coated steel wire ropes, and the service life extension is much higher than the price increase. Therefore, the average daily usage cost of phosphate-coated steel wire ropes is only 40-55% of that of smooth steel wire ropes, with lower usage costs and more cost-effectiveness. High, for reference only