THE ESTIMATION OF CATHODIC PROTECTION EFFICIENCY FOR CORROSION IN THE SOIL

A comparative evaluation of the efficiency of impressed current anode and cathodic protection in general can be given in complex laboratory tests. To do this, it is necessary to determine the dissolution rate of the anode material in model solutions, to obtain anodic volt-ampere characteristics, to compare the distribution of protective characteristics along the protected construction, depending on the anode material and the external current density. The intermediate resistance of electrode-soil interface is one of the most important characteristics that determine the effective work of anodes and it is depended on the nature of the anodic processes products. In the course of model tests, the relationship between the polarization resistance of the anodes and the protective zone length is shown.