A new outlook on corrosion control in offshore wind structures using FiGS® CP survey
How do you know if your offshore wind structure is protected from corrosion? With high resistivity in low saline water, high water currents, as well as a constricted anode placement on the monopile structure, this can be especially challenging.
Anodes at offshore jacket structures are normally well distributed, with a wide current throwing range. With its constricted base, this is not the case with the monopile structure, where anodes normally are congested on the transition piece. This makes it much more challenging to protect against corrosion in the open sea.
Performing a FiGS® CP survey allows us to perform a baseline survey of the external CP system to determine the current and potential distribution. In addition to determining this, it also quantifies the current drain to buried parts of the monopile.
With this data, we are able to confirm whether the structure is protected and provide a baseline for a future inspection plan.
Want to learn more about this? Go go to www.figs.no for more information.