CORROSION-MONITORING METHOD AND POLARIZATION RESISTANCE MEASURING DEVICE

摘要

PROBLEM TO BE SOLVED: To quantitatively monitor the corrosion status of a boiler steel material without stopping a boiler and without causing a personal difference. ;SOLUTION: The amount of flow from a branch pipe 1 is adjusted, the inside of a heating unit 2, a cell 4, and a buffer tank 10 is filled with blow water, and the blow water is stably overflowed from the overflow port of the buffer tank 10. A voltage is applied between a sample pole 7 and a reference pole 5 and a counter electrode and the polarization resistance of the sample 7 is measured. The obtained polarization resistance is checked against a calibration curve that has been obtained in advance, thus obtaining the change in the corrosion speed and hue (for example, a' value of L'a'b' color development system being defined in JIS Z 8729) of a material to be monitored in the boiler.;COPYRIGHT: (C)1998,JPO