ELECTROLYTIC CORROSION PREVENTIVE DEVICE

摘要

PURPOSE:To electrolytically protect a body to be protected day and night for a long period of time by respectively electrically connecting the anode of a solar battery and the cathode of a reverse blocking type semiconductor element to a galvanic anode and the cathode and anode thereof to the body to be protected. CONSTITUTION:An electrolytic corrosion preventive device is constituted by electrically connecting the anode of the solar battery 1 and the cathode of a diode 2 as the reverse blocking type semiconductor element provided in paral lel therewith to the galvanic anode 3 embedded in the ground 4 and electrically connecting the cathode of the solar battery 1 and the anode of the diode 2 to a steel pipe 5 which is the body to be protected and is embedded in the ground 4. The corrosion preventive current generated by the solar battery 1 in the day time flows out into the ground 4 then into the steel pipe 5 from which the current returns to the solar battery 1. On the other hand the current generated by the electromotive force based on the potential difference in the night time flows in the route of the anode 3 the ground 4 the steel pipe 5 the diode 2 the anode 3. The steel pipe 5 is thereby electrolytically protected efficiently day and night.