The wettability of the solid surface, the cohesion work and adsorption work of the material in mechanical seal applications-

The wettability of the solid surface, the cohesion work and adsorption work of the material for mechanical seal applications

　2017-03-14　　

The wettability of the solid surface, the cohesion work and adsorption work of the material for mechanical seal applications

In the application of mechanical seals, wetting is a common phenomenon. The degree of wetting of the liquid on the solid surface is measured by the contact angle. It can be obtained by the equilibrium equation of surface tension at the interface between liquid and solid. The smaller the contact angle, the better the wettability of the liquid, and vice versa. The coefficient of friction is related to the wettability of the lubricant on the friction surface.

The friction and wear of solids are related to the work of cohesion and adhesion of the substance. Without changing the cross-sectional area, the work done to a solid column with a cross-section of 1 square centimeter into two sections is called cohesion work, which represents the degree of attraction of the same substance. The specific surface energy after breaking is doubled. If the interface energy of the contact part of the upper material a and the lower material b of the column, if the column is broken at the interface a, b, the work done to the column is called the adhesion work and the column increases the surface energy after the disconnection. According to the function theorem, experiments have proved that the interface energy is approximately. If the two substances a and b cannot dissolve each other, the interface energy is larger, approximately, so it can be seen that the friction coefficient of the same substance is greater than that of different substances .　　351.html,

The surface (interface) free energy of mechanical seal application 　　 the adsorption phenomenon of solid surface in mechanical seal application