Based on the phenomenon of electromagnetic induction, it consists in inducing a current in a conductive material as a result of the alternating magnetic field acting on the material. The analysis of the value of changes in the electromagnetic field, the amplitude of the output signal or the amplitude of the phase shift makes it possible to assess the condition of the tested material. The test allows to detect surface discontinuities and subsurface defects, also for elements with large dimensions and complex geometric shapes.

Eddy current method – testing capabilities

• testing of materials that demonstrate electrical conductivity;
• detection of surface and subsurface defects – cracks (fatigue, hardening, grinding), inclusions, corrosion, coating thickness measurement, comparative structural tests. 

Eddy current method – equipment:

• GE Inspection Technologies Phasec 3D eddy current flaw detector with sets of specialized probes;
• Patterns of defects, conductivity, degree of corrosion.