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In lubrication, the boundary layer formed consists of long chain hydrocarbons with a polar head.(a) True(b) FalseThe question was posed to me at a job interview.Question is taken from Friction and Lubrication in Metal Forming in portion Types of Die & Metal Forming Processes of Casting-Forming-Welding II

Answer»

The correct choice is (a) True

Easiest explanation: In lubrication, the performance of boundary layers and its formation basically depends on its physical and chemical adsorption. The boundary layers formed by a MECHANISM MAINLY consist of clusters and LONG chain hydrocarbons with a polar head. Then this polar group adheres to the surface and forms high viscosity HYDROCARBON layers.



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