How does not lubritied after friction?why?
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Answer:
The characterisation of a lubricant is a fundamental part of any study of lubricated wear and friction. Various techniques of rheometry and chemical analysis are utilized as lubricant characterisation involves both chemical and physical parameters. There are many specialised techniques developed to provide data where general purpose equipment is inadequate. With each advance in understanding of tribology, the range of information required for lubricant characterisation increases. Where previously values of viscosity were sufficient to describe the lubricant rheology, it is now necessary to consider the pressure viscosity coefficient and limiting shear stress at extreme shear rates. Early lubricant degradation tests merely considered temperature while now the catalytic effect of a metal surface is included in the test.
Explanation: