High temperature corrosion and erosion resistant electrode

Details High temperature corrosion and erosion resistant electrode High temperature corrosion and erosion resistant electrode

1981-04-27

1984-05-08

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Conducting fluid

H02N 402

Patent

active

044477481

ABSTRACT:
High temperature corrosion and erosion resistant electrodes particularly useful for magnetohydrodynamic generators which electrodes utilize chemical ionization of combustion reactants to diffuse the current flow into the electrode. A combustible fuel, oxidant and electrically conductive material flow through porous, graded electrode components toward the plasma. Catalyzed combustion occurs near the face of the electrode exposed to the plasma which diffuses current transfer in the boundary layer and into the electrode. The reactants and combustion products thus combine simultaneously to cool the inner portions of the electrode, heat the outer portions, protect the exposed electrode surface from erosion, and alleviate the physical or chemical bonding of the by-products of coal combustion to the electrode surface which otherwise results in chemical degradation of the electrode.

REFERENCES:
patent: 3480805 (1969-11-01), Verrell
patent: 3508087 (1970-04-01), Millet et al.
patent: 4128776 (1978-12-01), Boquist et al.
patent: 4185213 (1980-01-01), Scannell

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