FiGS® cathodic protection survey

Integrity and inspection teams use the Field Gradient Sensor (FiGS®) to verify cathodic protection performance on subsea structures and pipelines where traditional contact-based surveys fall short. Ageing assets, buried sections and  interaction between structures make it difficult to assess anode output, coating condition and current distribution with confidence. This lack of reliable data increases the risk of undetected under-protection and leads to conservative maintenance or unnecessary retrofit decisions. 

Basis for planning and life extension

FiGS® captures high-resolution field-gradient data without physical contact, delivering continuous coverage across exposed and buried assets. The resulting data enables teams to confirm protection status, assess remaining anode life and plan inspection, maintenance and life-extension activities with confidence. 

Limited access hides corrosion activity 
Buried, rock-dumped or heavily coated pipelines restrict contact-based measurements, leaving corrosion activity undetected in critical areas. 

Unstable measurements undermine confidence 
Noise, drift and contamination in conventional probes reduce data reliability, making survey results difficult to trust or compare over time. 

Electrical interference distorts protection levels 
Interaction between connected structures may mask under-protection and accelerates anode depletion without clear warning. 

Slow surveys increase cost and blind spots 
Point-by-point measurements extend vessel time while still leaving gaps in coverage across subsea fields, driving uncertainty in integrity planning.