Corrosion control of dissimilar metals

Chemistry: electrical and wave energy – Apparatus – Electrolytic

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204147, C23F 1300

Patent

active

053424930

ABSTRACT:
A corrosion inhibiting system for protecting joined dissimilar metals which are contacted by an electrolyte includes an anode electrode located in the electrolyte and adjacent to the less noble metal, and a cathode electrode connected to the more noble metal, the anode electrode and the cathode electrode being connected to the positive output and negative output, respectively, of a source of direct current for causing a direct current to flow through the joined dissimilar metals to inhibit the flow of corrosion producing local current between the dissimilar metals. The corrosion inhibiting system is employed in a hot water heater having a glass lined steel tank with a copper bottom head.

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Lindsay M. Applegate; Cathodic Protection, pp. 1-28, published by McGraw-Hill Book Company, Inc., Feb., 1960.

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