Abstract:
A gelling nanofluid and methods for manufacture are provided. The composition and methods for manufacture produce nanofluid gels so that the settlement of nanoparticles in a base fluid is improved due to the inhibition of particle movement in the gel. The nanofluid gel is produced by using a gelling agent which is either coated on the nanoparticles prior to dispersion in the base fluid or directly introduced in the base fluid.
Abstract:
The process basically comprises: dissolving a lamellar disulphide, as a source of the solid lubricant, in an aqueous solvent, forming a first aqueous solution; dissolving a reducing agent, as hydroxylamine, sodium hypophosphite or sodium borohydride, in an aqueous solvent, forming a second aqueous solution; mixing the first and second aqueous solutions, forming a third aqueous solution; neutralizing the pH of the third aqueous solution; dissolving a sulphur source, in an aqueous solvent, forming a fourth aqueous solution; mixing the third and fourth aqueous solutions, forming a fifth aqueous solution, which is contained and heated in an autoclave; cooling the fifth aqueous solution to the room temperature; and removing, from the autoclave, the nanoparticles in powder form.
Abstract:
Die Erfindung betrifft eine Schmierstoffzusammensetzung auf der Basis modifizierter, natürlicher und nachwachsender Rohstoffe, deren Viskosität je nach Anwendung einstellbar ist. Insbesondere betrifft die Erfindung biologisch abbaubare Schmierstoffzusammensetzungen.
Abstract:
The invention is directed to oil soluble additive compositions, lubricating oil compositions, and additive concentrates comprising the salt of (1) a molybdenum oxide, sulfide, or oxysulfide and (2) an amide reaction product of a carboxylie acid component and a polyamine component wherein the charge mole ratio (CMR) of the carboxylie acid component to the polyamine component is about 2; 1 to 1 : 1.
Abstract:
Bei einem Kolben (1) für einen Verbrennungsmotor, mit Gleitlagerflächen (5) aufweisenden Nabenbohrungen (3) zur Aufnahme eines Kolbenbolzens, soll ein Festfressen und Verschleissen von Kolbenbolzen und Nabenbohrungen hochwirksam und kostengünstig dadurch vermieden werden, indem mittels Rotationszerstäubung eine selbstschmierende Beschichtung (6) aus einem thermisch ausgehärteten Harz mit darin eingelagerten Festschmierstoffpartikeln mindestens in einem Teilbereich (Tb) direkt auf die Gleitlagerflächen aufgebracht wird.
Abstract:
A method for protecting a metal surface from galling and corrosion includes a step of providing a protective dry film on the metal surface. The film includes a solid lubricant and a conducting polymer, the conducting polymer having lubricant properties and being capable of binding the solid lubricant to the metal surface. Threaded metal joint surfaces coated with the film are capable of resisting galling under high pressure and high torque conditions, even after several fastening and unfastening operations or over a long period of time. Protection from corrosion is also provided by the film. The method and film are economical in that only a single layer of protective compound need be applied in order to provide metal surfaces with both lubrication and protection against corrosion, and problems such as removal or leakage, which are associated with protective compounds that use oils, are avoided. Additionally, the dry film is advantageous because it does not contain heavy metals that are harmful to the environment.
Abstract:
This invention relates to a lubricating oil composition, comprising:(A) base oil;(B) a molybdenum and sulfur containing composition derived from a basic nitrogen containing compound, a molybdenum compound and carbon disulfide;(C) a boron-containing compound; and(D) optionally a phosphorus containing compound, provided the phosphorus content of the lubricating oil composition does not exceed about 0.10% by weight.
Abstract:
A lubricating agent which comprises a phosphate salt (A) containing at least one divalent or trivalent metal selected from the group consisting of Zn, Fe, Mn, Ni, Co, Ca, Mg and Al, a dispersant (B), and at least one lubricant (C) selected from the group consisting of a wax and a metal salt of a fatty acid. The lubricating agent is an aqueous agent and can be used for forming a lubricating coating film suitable for a plastic working, such as forging, wire drawing or pipe drawing, of a metal material such as steel, stainless steel, titanium or aluminum, without a chemical treatment of the metal material.
Abstract:
A grease composition having a base oil and a thickener, which grease additionally has from 0.05% to 30% by weight of sodium thiosulphate and at least 0.1% by weight of one or more additives selected from the group of: calcium salicylate, magnesium salicylate, calcium phenate, and calcium sulphonate, based on the total grease composition, and use of the grease composition to improve rust prevention and abrasion resistance. The invention also relates to a method for preparing the grease composition.
Abstract:
A circuit breaker which is excellent in heat resistance and oxidation resistance in lubricating an open/close mechanism and provides an extended, stable operation, and which comprises an open/close mechanism (A) housed in an insulating case (1) and for opening/closing a movable contact (3) from/to a fixed contact (2), an engaging unit (B) engaging with the open/close mechanism (A), and a tripping mechanism (C) for freeing the engagement of the engaging unit (B) when an over-current is detected in a cable way and separating the movable contact (3) from the fixed contact (2), wherein a part of the open/close mechanism (A) is formed of a material containing iron or iron compound, and its sliding portion is provided with a lubricating oil formed by adding 1 to 5wt.% of molybdenum disulfide to an oxidation inhibitor-added phenyl ether oil.