Properties of Lubricants

Applications of Lubricants

Lubricants are primarily used to reduce friction stress between surfaces. They have the following uses:

  • As antiwear, antioxidants, and antifoaming agents.

  • As demulsifying and emulsifying agents.

  • As rust and corrosion inhibitors.

  • In machinery as engine oils, compressor oils, gear oils, and piston oils.

  • As hydraulic, brake, and gear box fluids.

  • Used in the soap and paint industries.

Some specific uses of certain variants of lubricants are:

  • Synthetic lubricants are used in turbines, vacuum pumps, and semiconductor devices.

  • Molybdenum is used as a paint pigment and as a catalyst.

  • Liquid lubricants are used in medicines.

Lubricants are also used as cutting fluids in many industries. Oil, water, and oil emulsion are used as cutting fluids. These liquids are used to cool as well as to lubricate surfaces. Emulsions of oil in water are most widely used as cutting fluids. Lubricants are also used as cutting fluids in cutting, grinding, trading, and drilling of the metals. Cutting fluids are used in machining operations where friction is very high because of close contact between the work piece and the tool. This high friction generates a large amount of local heat and the tool is overheated and may even lose its temper and hardness. As a result, liquids, such as lubricating oils, water, or water emulsions are used on working parts of the machines.

Cutting fluids should have the following qualities:

  • Good lubricating property

  • Low viscosity, so that lubricants can easily fill in the cracks formed on the work piece

  • Chemical...

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Category: Metalworking Lubricants, Coolants, and Fluids
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