| 摘要 |
PROBLEM TO BE SOLVED: To provide a plant operation method capable of checking corrosion thinning that suppresses the effect of carbon steel pipes during plant operation and of improving the operating ratio of the plant. SOLUTION: At least three electrodes made of the carbon steel that is the same type of steel as that of the carbon steel pipe are exposed into water flowing through the carbon steel pipe; the presence of a corrosion thinning in a plurality of locations of the carbon steel pipe during the plant operation is watched using the reciprocal of noise resistance, noise resistance, or the standard deviation for the electrochemical current noise, calculated from an electrochemical noise between the measured electrodes as indexes; and based on the result, the amount of a corrosion inhibitor to be added is controlled. COPYRIGHT: (C)2009,JPO&INPIT |
