Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For alkali metal – alkaline earth metal – or compound thereof
Patent
1995-06-16
1997-05-27
Tung, T.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For alkali metal, alkaline earth metal, or compound thereof
204400, 204413, 205775, 205790, G01N 27416
Patent
active
056328818
ABSTRACT:
A simple robust sensor probe for determining the magnesium concentration in molten metal alloys in real-time. The probe provides needed process control information in molten metal technologies and has particular application to processes for removing magnesium impurities from scrap aluminum. The probe employs a specially constructed electrochemical concentration cell adapted for repeated immersions into vessels containing molten metal alloys. Specifically, the probe comprises two electrodes, both inert to a molten salt layer, to the molten metal (aluminum), and to magnesium. One electrode comprises an inverted molybdenum cup, a magnesium reference material, and a fibrous ceramic wick, e.g., yttrium oxide, for retaining molten salt therein in contact with the magnesium reference material when the sensor probe is first inserted into the molten salt layer and then into the molten aluminum layer. A readout between the two electrodes provides a measure of the electromotive force and thus a measure of the concentration of magnesium in molten aluminum during demagging of the molten aluminum.
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Gabelich Stephen A.
McHardy John
Denson-Low W. K.
Hughes Aircraft Company
Lachman M. E.
Sales M. W.
Tung T.
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