ADAPTIVE DEVICE OF CATHODE PROTECTION AGAINST CORROSION OF GROUP OF UNDERGROUND METAL STRUCTURES Russian patent published in 2012 - IPC C23F13/02 

FIELD: metallurgy.

SUBSTANCE: device includes transformer, rectifier the positive terminal of which is connected through filter of rectified voltage to anode earth conductor, silicon valves, sensor of value of protective potential of the main protected structure, N sensors of potential difference of additional protected structures, power switch and filter of the main structure, N power switches and filters of additional structures, potential setting device, comparing unit, amplifier, integrator and control units of power switch. At that, it is equipped with 2N sensors of distribution of potentials on the ground between protected structures, N operating amplifiers, N resistors in direct contact and N resistors in feedback contact of operating amplifiers, N potential adjusters, adjusting adder, N potential correction adders, N amplifiers, N integrators of additional protected structures and pulse-width modulators.

EFFECT: increasing efficiency of cathode protection and reducing power consumption.

1 dwg