Besides oils and fats, an anti-friction (AF) coating is a way of greasing components.
An AF-coating is a suspension of fixed grease-substances and solvents. After the coating has been applied to the metal surface the solvents evaporate and the grease-substances permanently attach themselves to the surface that needs greasing. The AF-coating separates the metal components, this prevents the metals from touching which limits friction and wear.
AF-coating is ideal in extreme conditions, such as extremely high temperatures or pressure. It can also be used to grease up engines and engine-components that need test-running or as an emergency-run grease-up before hydrodynamic greasing is obtained.