| 摘要 |
PURPOSE:To obtain a corrosion-proof electric potential estimation method for measuring or estimating the correct true corrosion-proof electric potential. CONSTITUTION:As for the corrosion-proof electric potential estimation method for a corrosion-proof objective article 1 in which an outside electric power source 4 whose negative side is connected with the corrosion-proof objective article 1 such as a buried pipe buried under the ground 5 and whose positive side is connected with an opposed electrode 3 buried in the ground 5 is installed, and electric corrosion-proof operation is carried out by suppllying electric corrosion-proof current from the ground 5 side to the corrosionproof objective article 1 side, the electric current which is formed by rectifying the full waves of the sine wave alternating current is used as the corrosion-proof electric current, and the electric potential between the corrosion-proof objective article 1 and the ground surface 50 is measured. Then, the dc component and the ac component of the electric potential are detected, and the sum of the dc ocmponent and constant times of the ac component is estimated as the corrosion-proof electric potential of the corrosion-proof objective article 1. |
