| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a system for monitoring a corrosion prevention state, where a function is installed for detecting a troublesome state (for example, damage on a coating) for maintaining an excellent corrosion prevention state with position accuracy to the degree between each observation point. SOLUTION: When monitoring the corrosion prevention state of a buried metal to which a coating and electric protection is applied, a direct-current measuring device 1 for measuring in the noncontact state the magnitude and the flowing direction of a protective current for the buried metal at at least one measuring spot is mounted so that a magnetic path is interlinked with the protective current. The current quantity and the flowing direction of the protective current measured by the direct-current measuring device 1 are discriminated, and a protective potential and a direct-current measured value at the measuring spot are discriminated based on the discriminated current quantity and flowing direction of the protective current, and the corrosion prevention state of the coating and the buried metal is evaluated based on the discriminated protective potential and direct-current measured value. COPYRIGHT: (C)2007,JPO&INPIT
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