Device and method for real-time monitoring of accidental...

Details Device and method for real-time monitoring of accidental... Device and method for real-time monitoring of accidental...

G - Physics

01

N

G01N 27/20 (2006.01) C23F 13/04 (2006.01)

Patent

CA 2057513

A method for monitoring damage to the protective covering of immersed or underground metal structures subjected to cathodic protection, based on the electrical resistance offered by the covering, and consisting of modulating the cathodic protection feed current and measuring the corresponding potential variation due to the ohmic loss, the resistance being obtained from the ratio of potential variation to modulation current, to activate an alarm system on sudden fall and rise in ohmic resistance due to accidental events.

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