Applications of Solid Lubrication Review

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Applications of Solid Lubrication Review

Applications of Solid Lubrication. Generally, solid lubricants are used in applications not tolerated by more conventional lubricants. The most common conditions requiring use of solid lubricants are:

(1) Extreme temperature and pressure conditions. These are defined as high-temperature applications up to 1926C ( 3500F), where other lubricants are prone to degradation or decomposition; extremely low temperatures, down to -212C (-350F), where lubricants may solidify or congeal; and high-to-fullvacuum applications, such as space, where lubricants may volatilize.

(2) As additives. Graphite, MoS2 , and zinc oxide are frequently added to fluids and greases. Surface conversion coatings are often used to supplement other lubricants.

(3) Intermittent loading conditions. When equipment is stored or is idle for prolonged periods, solids provide permanent, noncorrosive lubrication.

(4) Inaccessible locations. Where access for servicing is especially difficult, solid lubricants offer a distinct advantage, provided the lubricant is satisfactory for the intended loads and speeds.

(5) High dust and lint areas. Solids are also useful in areas where fluids may tend to pick up dust and lint with liquid lubricants; these contaminants more readily form a grinding paste, causing damage to equipment.

(6) Contamination. Because of their solid consistency, solids may be used in applications where the lubricant must not migrate to other locations and cause contamination of other equipment, parts, or products.

(7) Environmental. Solid lubricants are effective in applications where the lubricated equipment is immersed in water that may be polluted by other lubricants, such as oils and greases.

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