FIELD: measuring.
SUBSTANCE: proposed method relates to the field of physics, namely, to determining the dielectric characteristics of paint and varnish coatings and establishing the correlation between the changes in said characteristics and the physical and mechanical properties of the coating in the process of ageing. The existing methods for determining the dielectric characteristics are generally not applicable for work with paint and varnish coatings; and the known methods for evaluating protective coatings, including paint and varnish coatings, are either aimed at experimental application or do not allow the evaluation of the dielectric characteristics thereof. The dielectric characteristics of coatings can be determined by non-destructive methods, so determining the principles of changes in the dielectric characteristics in the process of ageing of coatings and determining the dependences of changes in the dielectric characteristics on physical and mechanical and other properties is valuable and practically significant. Some of the main dielectric characteristics for various objects are the Q-factor, dielectric permittivity, and the dielectric loss tangent. Method for determining the state of paint and varnish coatings based on dielectric characteristics is implemented on the basis of a known method involving the determination of changes in the dielectric permittivity and the dielectric loss tangent using a Q-meter by determining the Q-factor and the capacity of the object. The dependences of changes in the dielectric characteristics in the process of ageing of the coating, established therein, and the comparison of said values with known values of the physical and mechanical properties allow for a conclusion on the current state of the coating.
EFFECT: increase in the accuracy of determining the state of a paint and varnish coating by establishing the principles of measuring the dielectric characteristics in the process of ageing and comparing said values with the physical and mechanical properties of the coating.
1 cl, 1 dwg
