CIRCUIT OF CATHODE PROTECTION FOR TWO OR MORE STRUCTURES Russian patent published in 2000 - IPC

FIELD: electric equipment and technology of corrosion protection of underground and underwater structures. SUBSTANCE: given invention can be used for protection against corrosion of two and more gas lines, water and oil pipe-lines, communication cables, piers, pile walls, sea and river buoys, etc. Proposed circuit includes controlled rectifier-source of constant current, protected structures, anode grounding, silicon valves VS and VS₂, controlled R₁ and R₂. Plus terminal of controlled rectifier is connected to anode grounding, minus terminal of it is linked to common point of silicon valves interconnected with cathodes which anodes are connected to each protected structure via controlled resistors. EFFECT: effective joint cathode protection of two or more structures. 1 dwg