| abstract |
An object of the present invention is to measure a change in water quality of minute internal water simulating local corrosion of a metal member of a water-based plant using a microelectrode, and evaluate the occurrence and progress of local corrosion. Artificial pits 151 with a simulated structure of local corrosion at A water-based plant of the metal member is provided, the water quality changes in the internal water X of the artificial pits 151, by measuring with a microelectrode M 1, wherein the metal The occurrence or progress of local corrosion in the member is evaluated, and the occurrence or progress of local corrosion in the metal member is suppressed based on the measurement result. [Selection diagram] FIG. |