Effects of Flow on the Cathodic Protection of a Steel Cylinder in Seawater

摘要

The electric current density distribution around the circumference of a cathodically protected steel cylinder has been investigated. The water flow was perpendicular to the cylinder axis with the velocity ranging from 0.17 to 4.0 m/s. Measurements have been carried out and interpreted under consideration of flow konditions for 3.5% NaCl solution and artifical sea water, in the latter case both for an originally bare cylinder surface and a rustcovered surface. The possibility of transferring the results from a small scale laboratory cylinder to a large cylindrical part of real structure is discussed. 17 drawing, 1 table. (ERA citation 09:016900)