| 摘要 |
PURPOSE:To stabilize a corrosion preventive state by using a secondary battery which is charged by solar batteries as an external power source at the time of preventing the corrosion of a metallic body to be subjected to corrosion prevention by energizing this body, thereby obviating the stop of energization and maintaining the specified value of the current for corrosion prevention. CONSTITUTION:The secondary battery 9 is charged via a controller 10 for preventing back flow by using the solar batteries 11. The metallic body (aluminum tank for potable water) to be subjected to corrosion prevention and an anode for corrosion prevention are energized via a constant current circuit 12 from this secondary battery 9. The stop of the energization is thus obviated and the value of the corrosion preventive current is kept constant. The corrosion preventive state is thus stabilized. |
