Detection of pitting corrosion

Details Detection of pitting corrosion Detection of pitting corrosion

1997-11-26

2000-01-18

Tung, T.

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For corrosion

204404, 422 53, G01N 2726

Patent

active

060154845

ABSTRACT:
Apparatus and methods for monitoring localized or pitting corrosion of metal or other material are described. A probe having a working electrode made of the same material as the material being monitored is located in the same corroding environment as the material being monitored. The electrochemical noise detected between the working electrode and other electrodes is processed to provide an indication of the state of localized corrosion of the material being monitored. An anodic bias voltage is applied to the working electrode. This bias voltage accentuates localized corrosion at the working electrode, improving sensitivity and permitting more accurate evaluation of the electrochemical noise signals.

REFERENCES:
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patent: 4351703 (1982-09-01), Winslow
patent: 5139627 (1992-08-01), Eden et al.
U. Bertocci et al, J. Electrochem. Soc., vol. 14, No. 1, (Jan. 1997) pp. 31-43. Noise Resistance Applied to Corrosion Measurement.

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