SUBSEA CATHODIC PROTECTION (CP) SURVEY
Cathodic Protection (CP) is a technique used to mitigate the corrosion of a metal surface by making it the cathode of an electrochemical cell. The simplest method to apply CP is by connecting the metal to be protected with a piece of another less noble “sacrificial metal” to act as the anode of the electrochemical cell. The sacrificial metal, anode, then corrodes instead of the protected metal, cathode. For structures where passive galvanic CP is not adequate, for example in long pipelines, an external DC electrical power source can be used to provide current. Cathodic protection systems are used to protect a wide range of metallic structures in various environments. Common applications are steel, water or fuel pipelines and storage tanks, steel pier piles, ship and boat hulls, offshore oil platforms and onshore oil well caissons. Another common application is in galvanized steel, in which a sacrificial coating of zinc on steel parts protects them from corrosion.
Our skilled team of subsea technicians can carry out full CP surveys on structures and/or pipelines as applicable, in line with our clients requirements, industry accepted standards and as per the relevant governing bodies guidelines and requirements.