THE EFFECT OF THE ELECTRODE CONNECTION METHOD ON THE CONDUCTIVITY OF THE POLYMER-METAL STRUCTURE IN THE DIAGNOSIS OF PIPELINE DEFORMATIONS

In the presented work, using the example of polymethylmethacrylate and a steel pipe layout, the dependence of the potential barrier at the metal/polymer interface on the elastic deformation of steel is investigated. Organic polymer materials with a large band gap, such as polymethylmethacrylate, demonstrate outstanding electronic properties in films provided that the thickness of the latter is less than the penetration depth of the surface charge. Despite the fact that it is amorphous, the electrical conductivity in it can reach quite high values. By changing the parameters of the potential barrier at the metal/polymer interface, in structures containing polymethylmethacrylate, it is possible to make a transition from a low-conducting state to a high-conducting one, that is, to realize the effect of electronic switching. The studies were carried out using various methods of mounting the registration electrodes on the polymer/metal structure. It has been shown that the method of connecting the registration electrodes to the pipes under study using a magnet is simple, fast and the most promising for use in difficult climatic conditions compared to other methods considered. It has been established that magnetic fields with induction up to 0.4 T do not affect the electrophysical properties of metal/polymer/metal structures, provided that non-magnetic metals are used as registration electrodes.