Reduced corrosion electronic descaling technology

Details Reduced corrosion electronic descaling technology Reduced corrosion electronic descaling technology

1995-10-17

1997-09-23

Gorgos, Kathryn L.

Liquid purification or separation

Magnetic

204664, 205705, 205710, 205711, 205712, 138DIG6, C02F 148

Patent

active

056700415

ABSTRACT:
A method for minimizing localized corrosion of fluid containers that occurs as a consequence of most non-chemical procedures for removing scale deposits is described. It counteracts the unavoidable side-effect of the lowering of the local pH in the vicinity of the bubbles of CO.sub.2 that are generated during an electromagnetically-induced controlled precipitation procedure. The method is a simple and facile procedure for curbing the localized corrosion occurring as a result of most non-chemical procedures for removing scales. The method is desirably performed by an induction coil wrapped around a fluid container such as a pipe encrusted with scale through which hard water is flowing. A pulsing electrical current is successively applied through the coil and halted, preferably for 3 to 10 minutes each. When the current is applied, a transitory induced magnetic field is generated in the solution, and scale encrusted on the fluid container dissolves in the solution. When the pulsing current is stopped, the induced magnetic field in the solution ceases and so the scale stops dissolving, allowing a protective layer of scale to form over potential points of corrosion. Optionally permanent magnets may be used in the process, alone or with an induction coil.

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