Subsea Corrosion Ltd were recently involved in the replacement of ICCP anodes and reference electrodes onboard an operational FPSO located in the UK North Sea.
This took place after an initial review of the existing ICCP system. Upon investigation it was deemed that the existing non-functioning anodes could be replaced by a diver whilst the vessel was still at sea. This was carried out using a DSV and dive team. Initially this was carried on a single anode and a reference electrode was also replaced at the same time. Once this was completed, the anode and electrode were re-connected, the transformer rectifier was re-energised and the system was partially commissioned and left operational.
The remaining faulty anodes will be replaced during a 2022 dive campaign where possible, and the ICCP system will be commissioned and operational. The reference electrodes will also be replaced at the same time. This method provides significant cost savings to our Client.
Kevin Paterson, Director at Subsea Corrosion Ltd said, “This is a significant achievement for both Subsea Corrosion Ltd and our Client, allowing the ICCP system to be repaired whilst still on-station with no costly downtime. This approach allows the vessel to continue to operate whilst the retrofit is carried out, with no shutdowns or dry-docking.”
