Process for detecting failures in a dielectric coating on the surface of an electrically conducting substrate

摘要

the process involves placing a conductive substrate (1) covered with a dielectric layer (5) in a conducting medium in which an excitation electrode (2) is arranged at a distance from the subst subst subst subst subst subst substrats (1).we connect the substrate (1) and the electrode terminals (2) for excitation of alternating current generator (4), and in...the electrode (2) and the substrate (1), a coil (6) captrice oriented in a plane perpendicular to the lines of the electric field, and an electrode for measuring potential (7) in the openingthe coil (6) and the impedance is determined from the detected voltages and currents.