SACRIFICIAL ANODE ASSEMBLY, SERVICE LIFE-PREDICTING AND -DIAGNOSING SYSTEM FOR THE SACRIFICIAL ANODE ASSEMBLY, AND PUMP PROVIDED WITH THEM

摘要

PROBLEM TO BE SOLVED: To provide a technique for diagnosing the service life of a sacrificial anode by conducting monitoring in a real environment, before the sacrificial anode disappears due to corrosion prevention in sea water and the like.SOLUTION: In a system, a sacrificial anode assembly 31 comprises a sacrificial anode 105, and one or more second electrodes 102 that are embedded in the sacrificial anode 105 in an electrically insulated state. A conducting wire 101 for configuring a battery with a corrosion prevention object 100 is connected to the sacrificial anode. The second electrode is configured from a material that has a higher spontaneous potential than the sacrificial anode. The circumference of the second electrode is covered with an insulating material 104 for establishing electric insulation from the sacrificial anode, except for an exposed surface 107. The exposed surface of the second electrode is separated from the sacrificial anode by a distance corresponding to the thickness of the insulating material and is not electrically continuous with the sacrificial anode. Conducting terminals 108 and 109 are connected to the sacrificial anode and the second electrode, respectively, and each of conducting terminals 108 and 109 is connected to an ammeter 110. The current is detected when the battery is configured between the sacrificial anode and the second electrode.SELECTED DRAWING: Figure 1