Potential survey technique for prestressed concrete pipes
Potential survey technique for prestressed concrete pipes
- New search for: Brousseau, R.
- New search for: Chagnon, N.
- New search for: Baldock, B.
- New search for: Brousseau, R.
- New search for: Chagnon, N.
- New search for: Baldock, B.
The potential survey technique is unable to reliably identify corroded sections of a pipe buried in a conducting medium like soil. The soil allowed a galvanic corrosion current to pass between anodic and cathodic areas, and this considerably attenuated the potential gradients located between the two areas. The pipes had a tendency to polarize and move toward a uniform potential when there was electrical continuity between them. The ductile cast iron pipe acted as an anode and cathodically protected the prestressed concrete pipe when it was connected electrically to it. This masked any possible detection of anodic areas on prestressed concrete pipes. Potentials more positive than -200 mV vs the Cu/CuSO4 reference electrodes indicated pipe sections that had no trace of corrosion problems. Prestressed concrete pipes did not easily corrode.
Document information
Potential survey technique for prestressed concrete pipes
Potentialmeßtechnik für Spannbeton-Rohrleitungen
Materials Performance ; 36 , 8 ; 64-67
1997
4 Seiten, 4 Bilder, 8 Quellen
Article (Journal)
English
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