Voltage measurement with spaced reference electrode

Details Voltage measurement with spaced reference electrode Voltage measurement with spaced reference electrode

1977-08-17

1978-10-31

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

204195C, G01N 2746, G01N 2730

Patent

active

041233352

ABSTRACT:
Method and device for accurately measuring polarization voltage of a measured electrode with a reference electrode in the form of an electrode in direct contact with the ionic conductor and separated in spacing from said measured electrode. The error of ionic conductor IR drop between measured and reference electrodes is corrected by a voltage of opposed polarity connected in series with said reference electrode, made proportional to the DC current polarizing said measured electrode, and adjusted in value to produce a characteristic 0.020 volt separation between transition points of line slope change in the measured initial range of the polarization current-potential relationship. Calibrating circuitry enables an X-Y recorder to accurately plot the current potential relationship.

REFERENCES:
patent: 3748247 (1973-07-01), Weisstuch
patent: 3763007 (1973-10-01), Seyl
patent: 3893026 (1975-07-01), Glazkov et al.
patent: 4003815 (1977-01-01), Ikeda et al.
G. Lauer et al., "Effect of Uncompensated Resistance on Electrode Kinetic and Adsorption Studies by Chronocoulometry," Anal. Chem., vol. 38, pp. 1106-1112, (1966).
P. J. Moreland et al., "Technique & Instrumentation for Polarization Resistance Measurements," British Corrosion Journal, vol. 12, pp. 72-79, (1977).
D. A. Jones et al., "Polarization Methods for Measuring the Corrosion of Metals Buried Underground," J. Materials (USA) vol. 4, pp. 600, 602-605 (1969).
M. Prazak, "The Polarization Resistance Method for Corrosion Testing," Werkstoffe und Korrosion, vol. 25, pp. 104-112 (1974).

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