Corrosion rate measuring method and apparatus

Details Corrosion rate measuring method and apparatus Corrosion rate measuring method and apparatus

1979-05-16

1980-12-09

Weisstuch, Aaron

Chemistry: electrical and wave energy

Processes and products

204195C, 324 57R, 324 71R, G01N 2702, G01N 2706

Patent

active

042382980

ABSTRACT:
Sample plates of the material to be evaluated for corrosion resistance are arranged on electrodes immersed in a medium substantially corresponding to the actual environment of such material during use, small alternating current voltages of differing frequency are applied between the plates so as to determine from the difference between the peak voltages of the differing frequencies as converted from the currents flowing between both plates, the alternating current impedance of the corrosion reaction, which gives an indication of the corrosion rate of the material in the medium being tested.

REFERENCES:
patent: 3331021 (1967-07-01), Marsh et al.
patent: 4095176 (1978-06-01), Maes et al.
S. Sathyanarayama, "A New Electrochemical Method for Instantaneous Corrosion Rate Determination,"Electroanal. Interfacial Electrochem., vol. 50, pp. 441-416 (1974).
M. Prazak "The Polarization Resistance Method for Corrosion Testing," Werkstoffe und Korrosion, vol. 25, pp. 104-112 (1974).
P. J. Moreland et al., "Technique & Instrumentation for Polarization Resistance Measurements", British Corrosion J., vol. 12, pp. 72-79 (1977).

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