The FEMM is a potential
drop technique called Transient Potential Drop (Transient PD).
This technique, patented by Ferrx, is an electromagnetic method that
combines features of different potential drop techniques that
makes it highly versatile. FEMM measures the actual material degradation
caused by stress and fatigue.
Stresses measured in ferromagnetic steelMonitors elastic stress relative to a previous stress measurement. Calibration curves can easily be established which facilitate absolute stress monitoring.
Fatigue due to cyclic loadsMonitors the different phases of material deterioration until crack formation. The degree of fatigue can thus be monitored and, based on this data, remaining operational life of structures can be estimated.
Crack detection and crack growth monitoringThe initiation of cracks can be predicted, and crack growth can be monitored and crack size estimated.
Non-intrusive monitoring of internal defects in pipesMonitor internal erosion, corrosion and cracks. Measure pitting and crack max depth directly with a new and patented technique which differentiates between inside crack and pit.
Monitoring outer surface corrosionE.g. monitoring corrosion under insulation. Sensors on outside pipewall, same as used for monitoring internal corrosion.
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