Cathodic Protection
Preventing corrosion of a pipeline by using special cathodes (and anodes) to circumvent corrosive damage by electric current. Also a function of zinc coatings on iron and steel drainage products – galvanic action.
Caulking
General term which, in trenchless technology, refers to methods by which joints may be closed within a pipeline.
Cavitation
| Formulation and sudden collapse of vapor bubbles in a liquid; usually resulting from local low pressures – as on the trailing edge of a propeller; this develops momentary high local pressure which can mechanically destroy a portion of a surface on which the bubbles collapse. |
CCTV
Closed circuit television used to carry out internal inspection and survey of pipelines.
Cell
Electrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The call includes the external circuit which permits the flow of electrons from the anode toward the cathode (See Electrochemical CellElectrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The call includes the external circuit which permits the flow of electrons from the anode toward the cathode (See Electrochemical Cell).).