Method and apparatus for scaling control and in-situ...

Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Displacement or replacement coating

Reexamination Certificate

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C205S316000, C205S320000, C205S730000, C205S735000, C205S736000, C205S740000

Reexamination Certificate

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10200059

ABSTRACT:
A method and apparatus wherein an electrically conductive element is placed inside a previously installed metallic water vessel such as a supply pipe or well. A direct current voltage is then applied between the element and the conductive wall of the vessel. The conductive element can be a partially insulated wire. For causing deposition on the vessel, the voltage applied to the conductive element is of an amount sufficient to cause the potential of the metallic vessel to be lowered below the potential of the element by at least −0.3 volts, and more adequately −1.3 volts. An alternative embodiment involves reversing the polarity of the voltage applied between the conductive element and the vessel, causing the oxidation/reduction reaction to reverse, resulting in calcium carbonate being removed from the vessel by the production of acid at the surface of the vessel.

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