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Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium. [1] The two main dry lubricants are graphite and molybdenum disulfide. They offer lubrication at temperatures higher than liquid and oil ...
Molybdenum disulfide (or moly) is an inorganic compound composed of molybdenum and sulfur. Its chemical formula is MoS 2. The compound is classified as a transition metal dichalcogenide. It is a silvery black solid that occurs as the mineral molybdenite, the principal ore for molybdenum. [6] MoS 2 is relatively unreactive.
In most common greases, the thickener is a light or alkali metal soap, forming a sponge-like structure that encapsulates the oil droplets. Beyond lubrication, greases are generally expected to provide corrosion protection, typically achieved through additives. To prevent drying out at higher temperatures, dry lubricants are also added.
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By the 1890s, Valvoline oil was associated with winning race cars. [8] During the early 20th century, Valvoline was the recommended motor oil for the Ford Model T. [4] In 1949, Ashland Inc. purchased the Freedom-Valvoline Company. [9] By 2016, Ashland's Valvoline subsidiary accounted for about 37% of the parent company's annual revenue. [4]
Jason Kempin/Getty; CBS via Getty. Dolly Parton, Johnny Cash and June Carter Cash in 1985
A masterclass in clock management it was not from Atlanta Falcons head coach Raheem Morris as his team fell 30-24 in overtime to the Washington Commanders.. The first-year coach failed to properly ...
Typically, dementia is associated with classic symptoms like confusion and memory loss. But new research finds that there could be a less obvious risk factor out there: your cholesterol levels ...