ANTICORROSION MANAGEMENT METHOD FOR CATHODE PROTECTED BURIED METAL BODY, ANTICORROSION MANAGEMENT APPARATUS, ANTICORROSION MANAGEMENT PROGRAM, AND INFORMATION RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To quantitatively comprehend the foreboding sign of the stray current corrosion in a buried metallic body as an object for corrosion protection by a metal-to-electrolyte potential measurable between a reference electrode on the ground and the buried metallic body, and to comprehend the approximate cause of stray current corrosion risk.;SOLUTION: This method comprises: a measurement-treatment stage S1 where a unit measurement period equivalent to one cycle of commercial frequency is set to measure a metal-to-electrolyte potential per sampling interval set within the unit measurement period, and arithmetic processing is performed to obtain the maximum value from the measured value; a data acquisition stage S2 where the unit measurement period including the maximum value of the metal-to-electrolyte potential measured in the measurement period is extracted, and the time series data of the measured value within the unit measurement period are acquired; a stray current corrosion risk judgement stage S3 where the maximum value obtained from the measured value of the metal-to-electrolyte potential within the measurement period is verified with a cathodic protection standard to judge the signs of the stray current corrosion in the buried metallic body; and a cause discrimination stage S4 for stray current corrosion risk where whether influencing stray current is direct current or alternating current is discriminated based on the time series data acquired in the data acquisition stage S2.;COPYRIGHT: (C)2007,JPO&INPIT