C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
204/119, 204/88
C23F 13/00 (2006.01) C23F 13/08 (2006.01)
Patent
CA 1327180
ABSTRACT OF THE DISCLOSURE In a system for cathodically protecting an underground metallic structure where a sacrificial anode material encasing a metal core is in electrical communication with the structure, the core can be automatically and galvanicallydisconnected from electrical communication with the structure after the anode material has been consumed, by inserting in series between the structure and thecore a corrodible link made of a material which is less galvanically active than the anode material but more galvanically active than the material of the core. At least a portion of the corrodible link is exposed to the underground environment, so that upon consumption of the anode material, the corrodible link will corrode and break the connection between the core and the underground structure.
560439
Corrosion Service Company Limited
Sim & Mcburney
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