Provided is a water-based lubricating coating agent for a metal material, capable of carrying out a chemical conversion treatment and a lubrication treatment at the same time, which makes it possible to achieve excellent lubricity even in plastic working, press molding, and the like, and at the same time, operability (e.g., process shortening, sludge reduction). The water-based lubricating coating agent having pH of 2.0 to 6.5 for a metal material is obtained by blending: at least one lubricating component other than black-based solid lubricants; and at least one chemical conversion component selected from the group consisting of a phosphoric acid compound, an oxalic acid compound, a molybdic acid compound, a zirconium compound, and a titanium compound, the concentration of the lubricating component is 5 mass % or more in mass ratio to the total solid content mass in the lubricating coating agent, and the concentration of the chemical conversion component is 0.3 to 8 mass % when the total mass of the lubricating coating agent is regarded as 100 mass %.

Provided is a grease composition for a ball joint that can reduce the wear of a ball seat at a slide region and also has excellent compatibility with a dust cover. The grease composition for a ball joint comprises a base oil, a thickener, and an additive. The base oil contains an ethylene--olefin copolymer and the kinetic viscosity of the base oil at 40 C. is 2,000 to 6,000 mm.sup.2 /s. The additive contains a polar wax (e.g., monoamide wax or ester wax).

Provided is a grease composition for a ball joint that can reduce the wear of a ball seat at a slide region and also has excellent compatibility with a dust cover. The grease composition for a ball joint comprises a base oil, a thickener, and an additive. The base oil contains an ethylene--olefin copolymer and the kinetic viscosity of the base oil at 40 C. is 2,000 to 6,000 mm.sup.2 /s. The additive contains a polar wax (e.g., monoamide wax or ester wax).

A synthetic lubricant, cleaner and preservative composition and related methods for weapons and weapon systems, comprising: at least one isomer solvent; Alox 2100 calcium sulfonate; and at least one base oil selected from the base oil group consisting of: group I base oils; group II base oils; and group III base oils. Optional ingredients comprise mineral spirits, alpha-olefins, synthetic calcium sulfonates, fluoro-additives, and common moellen degras.

A synthetic lubricant, cleaner and preservative composition and related methods for weapons and weapon systems, comprising: at least one isomer solvent; Alox 2100 calcium sulfonate; and at least one base oil selected from the base oil group consisting of: group I base oils; group II base oils; and group III base oils. Optional ingredients comprise mineral spirits, alpha-olefins, synthetic calcium sulfonates, fluoro-additives, and common moellen degras.

Metal powder compositions for pressed powder metallurgy, and methods of forming metal parts using the metal powder compositions. The metal powder compositions include a metal powder and a lubricant system, which are pressed to form a green compact. When the green compact is heated during a delubing process, the lubricant system provides a reactive carbon coating on the surface of the metal powder, which upon subsequent sintering, reacts with metal oxides present on the surface of the metal powder to form gas that is easily removed from the system. Removing the metal oxides from the surface of the metal powder provides a more dense metal part, and allows for sintering of the green compact without the need for hydrogen gas, which would otherwise be needed to remove the metal oxides on the surface of the metal powder.

Metal powder compositions for pressed powder metallurgy, and methods of forming metal parts using the metal powder compositions. The metal powder compositions include a metal powder and a lubricant system, which are pressed to form a green compact. When the green compact is heated during a delubing process, the lubricant system provides a reactive carbon coating on the surface of the metal powder, which upon subsequent sintering, reacts with metal oxides present on the surface of the metal powder to form gas that is easily removed from the system. Removing the metal oxides from the surface of the metal powder provides a more dense metal part, and allows for sintering of the green compact without the need for hydrogen gas, which would otherwise be needed to remove the metal oxides on the surface of the metal powder.

A synthetic lubricant, cleaner and preservative composition and related methods for weapons and weapon systems, comprising: at least one isomer solvent; Alox 2100 calcium sulfonate; and at least one base oil selected from the base oil group consisting of: group I base oils; group II base oils; and group III base oils. Optional ingredients comprise mineral spirits, alpha-olefins, synthetic calcium sulfonates, fluoro-additives, and common moellen degras.

A synthetic lubricant, cleaner and preservative composition and related methods for weapons and weapon systems, comprising: at least one isomer solvent; Alox 2100 calcium sulfonate; and at least one base oil selected from the base oil group consisting of: group I base oils; group II base oils; and group III base oils. Optional ingredients comprise mineral spirits, alpha-olefins, synthetic calcium sulfonates, fluoro-additives, and common moellen degras.

The invention concerns a threaded portion of a tubular element for a threaded tubular connection having an axis of revolution, the portion comprising a threading extending over its outer or inner peripheral surface, and a first sealing surface on the peripheral surface, the first sealing surface being capable of producing metal-metal interference with a corresponding second sealing surface belonging to a complementary threaded portion. The threading and the first sealing surface are coated with a metallic anti-galling layer wherein zinc (Zn) is the major element by weight, the metallic anti-galling layer being at least partially coated with a lubricant layer comprising a resin and a dry solid lubricant powder dispersed in the resin.