The prospects of application of nano-coatings based on polymeric fluorocarbon composition and friction-mechanical brass plating for protection of heavily loaded mates machine parts operating under conditions of fretting corrosion. We studied the mechanisms of friction of nano-coatings that significantly reduce fretting wear.When choosing materials protective coatings of parts of high load of mates from fretting should pay attention not only to their durability, but also on the sensitivity to shear, i.e. the ability of a material to assume the shear deformation without the initiation of fatigue damage processes. It is known that this property have a thin enough coating, convenient and also those that do not violate the maintainability of components and allow you to keep in operation the tightness provided in the Assembly.