Cathelco ICCP systems are supplied for semi-submersibles and jack-up rigs operating throughout the world in locations ranging from the South Atlantic and Gulf of Mexico to the North Sea and Arctic waters off Russia.
This background of experience enables Cathelco’s corrosion engineers to design systems which provide the optimum level of protection against corrosion throughout the life of the structure.
ICCP systems consist of an arrangement of anodes and reference electrodes which are wired to one or more control panels. The reference electrodes monitor the electrical potential at the hull/seawater interface and send a reading to the control panel which automatically raises or lowers the output to the anodes.
The current from the anodes neutralises corrosion cells on the surface of the structure and eliminates differences in potential caused by weld seam material and the proximity of different types or grades of steel.
Cathelco’s expertise is in positioning the anodes to achieve the most effective pattern of current ‘spread’ and avoiding areas of ‘shadowing’. In some instances this requires the use of a combination of ICCP and sacrificial anodes.
Semi-submersibles and jack-up rigs generally have long periods between drydocking. Cathelco anodes and reference electrodes are designed to last up to 15 years and are diver changeable if replacement due to damage is necessary before this time.