Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1985-10-03
1986-07-22
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204 1T, 204400, G01N 2758
Patent
active
046018107
ABSTRACT:
An electrochemical concentration cell adapted for immersion in a melt of aluminum-magnesium alloy for determining the concentration of the Mg on an ongoing basis (e.g., during demagging). The cell includes a first probe comprising a housing having a cavity therein containing a Mg-ion-rich molten salt electrolyte. An opening in the housing exposes the electrolyte to the melt via a porous ceramic frit wetted by the electrolyte. A hollow capsule containing a Mg-rich reference material is immersed in the electrolyte and the reference material electrically coupled to the melt via second probe immersed therein. Containment of the reference material within the capsule beneath the melt prevents attack of the housing by the reference material and evaporative loss thereof.
REFERENCES:
patent: 3565769 (1971-02-01), Holden et al.
patent: 3794569 (1974-02-01), Kawai et al.
patent: 3816269 (1974-06-01), Wilder
patent: 4166009 (1979-08-01), Fray
Lukashenko and Pogodoyev, "The Thermodynamic Functions of Liquid Mg--Al Alloys", Russian Metallurgy (1971).
G. K. Belton and Y. K. Rao, "A Galvanic Cell Study of Activities in Mg--Al Alloys", Transactions of the Metallurgical Society of AIME, 245, 2189-2193, (1969).
Howie Blake J.
Tiwari Basant L.
General Motors Corporation
Kaplan G. L.
Plant Lawrence B.
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