Study on Cathodic Protection of Submarine Pipeline in Deep-water Environment

摘要

As an effective technology in preventing metal structures from corrosion in marine environment, the cathodic protection has been widely used for shallow-water oil & gas transportation and storage facilities. On the other hand, parameters like temperature, pressure and dissolved oxygen content in deep-water environment are quite different from those in shallow-water area, bringing lots of uncertainties and difficulties for the application of CP technology. In the present work the CP current density requirement, the CP potential range and the service performances of aluminum alloy sacrificial anode for carbon steel and stainless steel in deep-water environment are studied through indoor experiments. The results can provide some references for the application of CP technology in deep-water environments.