Electrochemical noise monitoring of corrosion in soil near a pipeline under cathodic protection
- NW Natural
- Intercorr International Inc.
Electrochemical noise (EN), linear polarization resistance (LPR), and harmonic distortion analysis (HDA) were used with three-electrode probes to monitor the corrosion occurring in soil near a gas pipeline under cathodic protection. The test site was a cathodic protection (CP) test station where impressed current CP was applied to a 2 in. (5.1 cm) diameter coated steel pipe using an 84 in. (0.2 m) TA-2 high-silicon cast iron anode. Electrochemical measurements were made at two locations inside the CP field and one outside the CP field. One set of measurements was made with the CP system off to obtain base line data and two with the CP system on. Results indicate that CP does not interfere with the measurement of corrosion rate and pitting factor using EN, LPR, and HDA techniques.
- Research Organization:
- Albany Research Center (ARC), Albany, OR
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- OSTI ID:
- 898996
- Report Number(s):
- DOE/ARC-2004-024
- Country of Publication:
- United States
- Language:
- English
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