Submarine Pipelines Cathodic Protection
Submarine pipelines may be buried in the seabed or in direct contact with seawater. Submarine pipeline cathodic protection is used as a complement to coatings and can be applied alone or with a protective concrete sheath. Submarine pipeline cathodic protection is usually performed because of the lack of electricity and ease of installation by the sacrificial anode method. The anodes used in this method are usually aluminum or zinc, which aluminum is more commonly used because of the higher current capacity. The anodes used in submarine pipelines are of bracelet type and are surrounded by pipelines. These anodes are usually composed of two parts that are connected through the core by welding or screwing.
In the submarine pipelines cathodic protection, the anodes are mounted at equal intervals to protect the pipeline. The number, shape and position of the anodes installed in the structure are obtained by providing the necessary protection through relevant calculations and designer experiences. The designer should select the layout and dimensions to avoid the under protection in some areas and the overlap that results in the overuse of the anodes. The electrical connection of the anodes cable to the pipeline is accomplished by direct welding to the body of the pipeline or by means of a clamp.
Bracelet aluminum anodes manufactured by Borna Electronics Co. used in submarine pipelines
Schematic of cathodic protection for marine pipelines (without concrete coating) by sacrificial anode method using bracelet aluminum anodes
Schematic of cathodic protection for marine pipelines (with concrete coating) by sacrificial anode method using bracelet aluminum anodes
Borna Electronics Co. with over 30 years of experience in cathodic protection, declares its readiness to design, procurement, consultation and construction of cathodic protection systems for submarine pipelines.
