GAP CORROSION SENSOR AND GAP CORROSION MONITORING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a gap corrosion sensor for visualizing and predicting gap corrosion in a short time without requiring any special technique, and a gap corrosion monitoring system.;SOLUTION: A gap corrosion sensor has: a first immersion electrode 22; a second immersion electrode 26 arranged to form a gap 34 that a liquid enters with the first immersion electrode 22; and a no-resistance ammeter 20 connected to the first immersion electrode 22 and second immersion electrode 26. The non-resistance ammeter 20 applies a cancel voltage for canceling a potential difference generated between the first immersion electrode 22 and second immersion electrode 26 owing to gap corrosion occurring to the gap 34 between the first immersion electrode 22 and second immersion electrode 26, and measures a current value during the application of the cancel voltage, the second immersion electrode 26 having smaller immersion area than the first immersion electrode 22.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT