Use of electrochemistry to detect buried service lead (Pb)...

Details Use of electrochemistry to detect buried service lead (Pb)... Use of electrochemistry to detect buried service lead (Pb)...

2006-10-24

2006-10-24

Noguerola, Alex (Department: 1753)

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

C205S790500, C205S775500

Reexamination Certificate

active

07125482

ABSTRACT:
The present invention relates to using a rectifier, a groundbed consisting of four (4) copper rods, power supply, three (3) copper/copper sulfate (Cu/CuSO4) reference electrodes, a data logger for detecting and identifying buried lead (Pb) and copper (Cu) service pipes by their electrochemical potentials. More specifically, the present invention relates to using the electrochemical potentials of lead (Pb) versus copper/copper sulfate (Cu/CuSO4) reference electrode (−0.500 volts) and also using the electrochemical potentials of copper versus copper/copper sulfate (Cu/CuSO4) reference electrode (−0.200 volts) which is utilized under field (actual, environmental or in situ) conditions in detecting and differentiating buried lead (Pb) service pipes and buried copper pipes which are sometimes attached to the same water meter and cast iron water supply main.

REFERENCES:
patent: 4823072 (1989-04-01), Walcott et al.
patent: 2299743 (2001-08-01), None

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