APPARATUS FOR PREVENTING CORROSION OF STEEL PIPE BURIED UNDER POWER-TRANSMISSION LINE BY GALVANIC ANODE SYSTEM

• Main Authors: HORIUCHI TOSHIO, IMAKITA YOSHIMASA, SASAHARA YUKIMI
• Format: Patent
• Language: English
• Published: 29.01.1987
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

PURPOSE:To effectively prevent the corrosion of a steel pipe buried under a power-transmission line for a long period by connecting galvanic anodes to the steel pipe and further connecting lower ground electrodes to the steel pipe through reactance circuit elements so as to prevent the AC corrosion of the galvanic anodes. CONSTITUTION:Galvanic anodes 4a, 4b for electrolytic protection are connected to a steel pipe 2 buried under a power-transmission line 1. Lower ground electrodes 3a, 3b made of an electrically conductive material other than the material of the anodes 4a, 4b are further connected to the steel pipe 2 through reactance circuit elements including at least capacity reactance circuit elements 7a, 7b.