Blog: Corrosion Mapping of Coated and Clad Offshore Assets

▤ Summary

Pipes, such as risers, caissons, and conductors, that run through the splash zone region of an offshore asset can be subject to process-induced internal surface corrosion threats – often small, deep, and isolated in nature and notoriously difficult to locate and identify quickly. The splash zone area – with its typical external marine growth, surface protection condition, and changing sea level position – cause limitations for sound-based techniques to achieve required sound coupling. Despite coatings or clad material in place, the electromagnetic technology is adaptable in applied magnetic field strength and induced alternate current frequency to allow inspection and defect sizing equal to non-coated/non-clad surfaces. With this critical performance data in hand, owners can make informed decisions, scheduling maintenance and repair activities within a safe service window to maximize productivity and avoid unplanned downtime. The advanced partial saturation high frequency eddy current technology demonstrates the mapping and sizing capabilities in harsh offshore environments and additionally copes with inspection through coatings and clad material.

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