Effective activation energies of chemical reactions and viscous flow of liquids depending on pressure in tribosystems with boundary and mixed friction

Abstract

This work presents a kinetic analysis of the probable chemical reactions in a frictional contact zone depending on their energetics, temperature, and pressure, as well as the impact of these factors on the viscous flow of liquids, which can be used as an oily base in tribosystems with mixed boundary friction. The dependences of the effective activation energy and viscous flow of liquids on pressure have been analyzed. It has generally been shown that the effective activation energy of thermally activated chemical reactions and viscous flow depends on the activation volume and consists of standard activation energy under standard conditions and additional components connected with the influence of pressure on these processes.