Deformation characteristics and properties  of thin-layer polyamide coatings  in compression connections

Compression connections in machine units may be destroyed as a result of fretting corrosion. One way to combat this can be the use of polymeric polyamide coatings. The technology applying such coatings and their working conditions in compounds with interference have many features. We investigated values of static and instantaneous moduli of elasticity, Poisson’s ratio, the value of creep function and its dependence on hydrostatic pressure for polyamide coatings on a steel substrate. Instantaneous modulus of elasticity for polyamide coating PA-6 is almost three orders of magnitude greater than its static value, and Poisson’s ratio is 0.5. Creep function of polyamide coatings decreases with increasing hydrostatic pressure.