ELECTRIC CORROSION PROTECTION CURRENT MONITOR AND MONITOR SYSTEM USING THE SAME

摘要

PURPOSE: To improve the safety of an underwater metallic structure subjected to electrolic corrosion protection and to assure the long-term durability thereof by mounting a sensing electrode of the same kind of the metal as the metal of this structure at the structure and monitoring the electrolic corrosion protection current between both. ;CONSTITUTION: The sensing electrode 4 which is formed of the steel plate equal to the steel plate of the underwater steel structure 1 mounted with a sacrificial anode 2 or of the same kind thereof is mounted at the steel structure 1 in the form of sticking the electrode to a part of the steel structure. An electric circuit by insulation coated lead wires is formed at the sensing electrode 4 and the steel structure 1. This circuit is provided with a non-resistance ammeter 5 to monitor the electric corrosion protection current flowing in the circuit, by which the protection state is discriminated. The sensing electrode 3 and the insulation coated lead wires are provided with means for preventing their failure at need. Further, an electric corrosion protection monitor system to concentrate current data and to recognize the corrosion protection state cover the entire part of the steel structure over a long period of time is preferably constituted by disposing plural pieces of the electric corrosion protection monitors.;COPYRIGHT: (C)1996,JPO