Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1992-05-11
1993-08-24
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204421, 204422, G01M 2726
Patent
active
052385531
ABSTRACT:
A reference electrode for use in measuring electrochemical corrosion potential and pH of, for example, water in a drum boiler at supercritical temperatures and which is corrosive includes an alumina or zirconia tube which is packed with a bulk solid electrolyte. The electrolyte consists of a mixture of silver chloride and glass in an optimally 2 to 4 weight ratio or glass particles with silver chloride precipitated around each particle. A solidified silver chloride electrode interfaces with the bulk electrolyte and has embedded in it a conductive silver electrode which provides the electrical contact. Use of the foregoing provides an immobilized solid electrolyte which displays stability and integrity as the temperature and pressure cycles between extremes.
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A Solid Polymer Electrolyte Internal Reference Electrode for High Temperature Aqueous Systems, by S. Hettiarachchi and D. D. Macdonald, J. Electrochem. Soc. 134, May '87, pp. 1307-1308.
Silver-Silver Chloride Thermocells and Thermal Liquid Junction Potentials for Potassium Chloride Solutions at Elevated Temperatures, by D. D. Macdonald, A. C. Scott, P. R. Wentrcek, J. Electrochem. Soc. 126, Sep. 3 79, pp. 1618-1624.
External Reference Electrode for Use in High Temperature Aqueous Systems, by D. D. Macdonald, A. C. Scott, P. R. Wentrcek, J. Electrochem. Soc. 126, Jun. '79, pp. 908-911.
Hettiarachchi Samson
MacDonald Digby D.
Song Herking
Bell Bruce F.
Electric Power Research Institute
Niebling John
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