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lubricity
Lubricity is the measure of the reduction in friction and or wear by a lubricant. The study of lubrication and wear mechanisms is called tribology.
==Measurement of lubricity==
The lubricity of a substance is not a material property, and cannot be measured directly. Tests are performed to quantify a lubricant's performance for a specific system. This is often done by determining how much wear is caused to a surface by a given wear-inducing object in a given amount of time. Other factors such as surface size, temperature, and pressure are also specified. For two fluids with the same viscosity, the one that results in a smaller wear scar is considered to have higher lubricity. For this reason lubricity is also termed a substance's ''anti-wear property''.
Examples of test setups include "Ball-on-cylinder" and "Ball-on-three-discs" tests.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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