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A crystalline form of carbon having a laminar structure, which is used as a lubricant. It may be of natural or synthetic origin.

Related Terms


To form a stable, water-soluble complex.


(1) chemically speaking, a distinct substance formed by the combination of two or more elements in definite proportions by weight and possessing physical and chemical properties different from those of the combining elements. (2) in petroleum processing, generally connotes fatty oils and similar materials foreign to petroleum added to lubricants to impart special properties.


An anti-friction rolling type bearing containing rolling elements in the form of balls.


In lubrication, either an additive or a compounded lubricant having the property of keeping insoluble matter in suspension thus preventing its deposition where it would be harmful. A detergent may also redisperse deposits already formed.


A substance containing by volume approximately 78 - 79% nitrogen; 20.95% oxygen, 0.94% argon, traces of carbon dioxide, helium, etc.


The temperature at which waxy crystals in an oil or fuel form a cloudy appearance.


The state of air being suspended in a liquid such as a lubricant or hydraulic fluid.


A lubricant containing asphaltic materials, which impart extra adhesiveness, that are used for open gears and steel cables.


The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.


The property of a lubricant that causes it to cling or adhere to a solid surface.
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