Corrosion control of dissimilar metals

Details Corrosion control of dissimilar metals Corrosion control of dissimilar metals

1994-05-25

1995-08-29

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204147, 204148, 20415311, 204404, G01N 2726, C23F 1300

Patent

active

054457190

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.

REFERENCES:
patent: 1020480 (1912-03-01), Cumberland
patent: 3055813 (1962-09-01), Schaschl et al.
patent: 3649492 (1972-03-01), Marsh et al.
patent: 4351703 (1982-09-01), Winslow
Applegate, Cathodic Protection, 1960, pp. 5-24.

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