What is phosphating of galvanized steel wire rope?

The consequences of the sudden fracture of galvanized steel wire rope may be material damage or personal injury. The prolongation of the service life of galvanized steel wire rope means the improvement of reliability and economy. Phosphating is a good treatment technology to increase the life of galvanized steel wire rope, that is, a layer of phosphating film is formed on the surface of galvanized steel wire rope. The porous structure of phosphating film can increase the storage capacity of lubricating grease on the surface of steel wire for rope making, reduce the friction factor, promote sliding, delay the occurrence of micro motion damage on the surface of steel wire, inhibit the initiation of fatigue micro cracks, and greatly extend the service life of galvanized steel wire rope.

Some materials of the steel wire will be dissolved during the phosphating process. The weight of the phosphating film is 3-15g / m2, and the diameter of the steel wire after phosphating is almost unchanged; When the weight of phosphating film is more than 20g / m2, the increase value of steel wire diameter is also very limited, and the mechanical properties of steel wire have no obvious change before and after phosphating. The weight of phosphating film can be tested according to the corresponding national standard GB / t9792-2003 determination of film mass per unit area on metal materials. For the twisted phosphated galvanized steel wire rope products, the phosphating film weight of the rope steel wire can be inspected by dismantling the strands. The lubricating grease coated on the surface of the steel wire can be cleaned with an organic solvent first, and then the phosphating film weight can be measured by the above weight method after air drying.