An agent for forming a solid lubricating coating film on a thread portion of oil country tubular goods, in which a binder resin contains a prepolymer and a curing agent, the prepolymer is formed of one or more epoxy resins, 70 parts by weight or more of the prepolymer is contained with respect to 100 parts by weight of the binder resin, the epoxy resin constituting the prepolymer has an epoxy equivalent of 100 or more and 500 or less, the solid lubricant contains boron nitride (BN) in an amount of 80% by weight or more, BN has an average particle size of 10 ?m or less, and a total weight of the solid lubricant is 0.1 times or more and two times or less a total weight of the binder resin.

A fullerene derivative, used as a lubricant, includes, in a molecule: a fullerene backbone; and n pyrrolidine rings each being condensed to the fullerene backbone, each of the pyrrolidine rings including one aryl group including a group including m perfluoropolyether chains, m being an integer from 2 to 5 and n being an integer from 1 to 5.

In an amorphous carbon film of a sliding member, provided that a number of nitrogen atoms each singly bonded to three carbon atoms is A, and a number of nitrogen atoms each singly and doubly bonded to two carbon atoms, respectively, is B, a value A/B of the amorphous carbon film obtained through X-ray photoelectron spectroscopy analysis is 10 to 18. The method includes irradiating the surface of the substrate with nitrogen ion beams and irradiating a carbon target with electron beams, thereby forming an amorphous carbon film on the surface of the substrate while vapor-depositing a part of the carbon target onto the surface of the substrate. The output of the electron beams that irradiate the carbon target is 30 to 50 W.

The present invention is able to provide a lubricating oil composition having excellent thermal/chemical stability even when used for a compression refrigerating machine using a saturated fluorinated hydrocarbon refrigerant having a low carbon number and a low global warming potential, by using a refrigerant containing a saturated fluorinated hydrocarbon having from 1 to 3 carbon atoms, which uses, as a base oil, an oxygen-containing organic compound composed of at least one member selected from a polyoxyalkylene glycol, a polyvinyl ether, a copolymer of a poly(oxy)alkylene glycol and a polyvinyl ether, a copolymer of a poly(oxy)alkylene glycol monoether and a polyvinyl ether, and a polyol ester, each having a water content of not more than 500 ppm by mass.

A system and method for forming at least one of graphene and graphene oxide on a substrate and an opposed wear member. The system includes graphene and graphene oxide formed by an exfoliation process or solution processing method to dispose graphene and/or graphene oxide onto a substrate. The system further includes an opposing wear member disposed on another substrate and a gas atmosphere of an inert gas like N2, ambient, a humid atmosphere and a water solution.

Greases that are suitable for use in high temperature applications and are cost-effective alternatives to lithium greases. The greases are prepared from an oil of lubricating viscosity; 1.0 to 22.5 wt % of an overbased metal detergent; 5.0 to 18.5 wt % of a metal carboxylate soap component that is the reaction product of a metal hydroxide and/or metal carbonate with a fatty acid; 0.2 to 8.0 wt % of an oxygenate promoter (for example alcohols and/or organic acids); and 1 to 15 wt % of water. The greases have dropping points of at least 220 C., as measured using ASTM D2265.

Disclosed is a method for fabricating a low friction and highly durable coating on a solid substrate. Also disclosed is a coating that increase durability and reduce friction of a substrate. The coating comprises at least one layer polydopamine and one layer of graphite. Dip coating is used to deposit said polydopamine layer on top of a substrate and then said graphite coating on top of said polydopamine layer.

A tubular threaded joint is constituted by a pin and a box each having a contact surface comprising an unthreaded metal contact portion including a seal portion and a shoulder portion and a threaded portion. Of the contact surface of at least one of the pin and the box, the surfaces of the seal portion and the shoulder portion has a first lubricating coating in the form of a solid lubricating coating, and the surface of the threaded portion or the entire surface of the contact surface has a second lubricating coating selected from a viscous liquid lubricating coating and a solid lubricating coating. The first lubricating coating has a coefficient of friction which is higher than that of the second lubricating coating, and the second lubricating coating is positioned on top in a portion where both the first lubricating coating and the second lubricating coating are present.

The present invention describes the highly advantageous properties of a mixture of thiol-perfluoropolyether (PFPE) molecules with perfluorinated bisphosphonic (PF-BP) compounds. This mixture makes it possible in effect to obtain a lipophobic behavior (also referred to as epilame effect) with common watch-making lubricants on all the materials tested, including metals, inter alia gold and alloys thereof, ceramics and semiconductors, and gives the surface treated a good resistance to ageing and to cleaning products.

A sliding mechanism includes first and second members slidable relative to each other and a grease composition interposed between the first and second members and containing a thickening agent and a base oil, wherein the grease composition contains lithium 12-hydroxystearate as the thickening agent and dioctyl sebacate and/or poly--olefin as the base oil; and wherein at least one of the first and second member has a sliding surface coated with a hard carbon film of diamond-like carbon.