The present invention provides a steel wire rod including a lubricating coating film, which can reconcile workabilities such as wire drawability, spike property, ball ironing property and film removability, and corrosion resistance such as long-term rust prevention property. The steel wire rod includes a lubricating coating film on a surface, wherein the lubricating coating film contains a water-soluble silicate and a water-soluble tungstate, a mass ratio of water-soluble tungstate/water-soluble silicate being in a range of 0.7 to 10, and contains no phosphorus

A coating composition for a lubricating coating film includes: (A) a phenolic resin (B) an epoxy resin having an epoxy equivalent weight of 600 to 4000; and (C) at least one type of solid lubricant. The epoxy equivalent weight is generally defined by the number average molecular weight per the number of epoxy groups in a single molecule. The coating composition has a weight ratio of component (A) to the total weight of component (A) and component (B) of at least 50 weight %. A lubricating coating film, formed from the coating composition, has a high level of flexibility on surfaces of various base materials.

A coating composition for a lubricating coating film includes: (A) a phenolic resin (B) an epoxy resin having an epoxy equivalent weight of 600 to 4000; and (C) at least one type of solid lubricant. The epoxy equivalent weight is generally defined by the number average molecular weight per the number of epoxy groups in a single molecule. The coating composition has a weight ratio of component (A) to the total weight of component (A) and component (B) of at least 50 weight %. A lubricating coating film, formed from the coating composition, has a high level of flexibility on surfaces of various base materials.

Provided is a solid lubricant having high durability. The solid lubricant comprises a material having a hexagonal crystal structure. A ratio of a plane other than (002) plane to (002) plane of the solid lubricant at an interface with a base material to be coated is higher than a ratio of a plane other than (002) plane to (002) plane on a surface of the solid lubricant. Alternatively, a ratio of a peak intensity of X-ray diffraction for the plane other than (002) plane to a peak intensity of X-ray diffraction for (002) plane of the solid lubricant at the interface with the base material is higher than a ratio of a peak intensity of X-ray diffraction for the plane other than (002) plane to a peak intensity of X-ray diffraction for (002) plane on the surface of the solid lubricant.