| abstract |
An aqueous lubricant, for use in the plastic work of a metal material, this lubricant comprises: (A) an inorganic water-soluble salt, and (B) a wax, where the components dissolve or disperse in water, and in which A weight ratio of the solids concentration, (B) / (A) is 0.3 ~ 1.5. And a method for producing a lubricating film, characterized in that a lubricating film is produced by applying the aqueous lubricant, preferably in a dry weight of 0.5 ~ 40 g / m2, on the surface of a metallic material, which does not provide there a conversion layer Chemistry, followed by drying. The aqueous lubricant also preferably comprises (C) a metal salt of a fatty acid, in a solid concentration ratio, (C) / (A) of 0.01 ~ 0.4. The inorganic salt (A), soluble in water, is preferably selected from a sulfate, silicate, borate, a molybdate and a tungstate. The wax is preferably synthetic, which is dispersed in water and has a melting point of y0 ~ 150 degree C. The metal salt of a fatty acid (C) is preferably obtained through the reaction of a saturated fatty acid, with 12-26 carbon atoms, with a metal selected from zinc, calcium, barium, aluminum, magnesium and lithium. The aqueous lubricant can be used to impart excellent lubricity, easily, to the metal surface, which does not have a chemical conversion layer formed thereon. |