Water tank having electric heating element and cathodic corrosio

Details Water tank having electric heating element and cathodic corrosio Water tank having electric heating element and cathodic corrosio

1978-10-25

1981-03-10

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

126361, 219312, 204195F, 204196, H05B 382, F24H 100, C23F 1300

Patent

active

042556473

ABSTRACT:
An anticorrison protected small electric household water heating tank includes a metal tank having a passive anticorrosive layer provided on an inner wall thereof. A U-shaped electric immersion heating element is horizontally arranged in a lower region of the tank. A pair of electrodes are supplied with external current, one being an external current anode horizontally arranged above and perpendicular to the arms of the U-shaped heating element and the other being the tank itself. A reference electrode is also provided in the lower region of the tank. A potentiostat is connected to the reference electrode and tank for detecting the potential between the reference electrode and tank, for comparing the detected potential between tank and reference electrode to a reference voltage and for adjusting the current flow to the external electrodes to maintain an optimum potential between the tank and reference electrode. The reference electrode is of "Ag/AgCl" and is surrounded by a flow preventing sheathing which creates a zone of stagnant water about the reference electrode. An additional anode can be provided in the upper region of the tank and the current therethrough controlled by the potentiostat.

REFERENCES:
patent: 2021519 (1935-11-01), Polin
patent: 2934484 (1960-04-01), Anderson
patent: 3037925 (1962-06-01), Boncher et al.
patent: 3056738 (1962-10-01), Fischer
patent: 3132081 (1964-05-01), Sutton
patent: 3132082 (1964-05-01), Overmyer
patent: 3142361 (1964-07-01), Woodley
patent: 3176115 (1965-03-01), Balis
patent: 3378472 (1968-04-01), Banks et al.
patent: 3634222 (1972-01-01), Stephens
patent: 3715566 (1973-02-01), Wasson

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