Eddy Current Examination
Eddy current testing uses an alternating magnetic field to induce small electric currents in the component being examined. These currents are affected by surface or slightly sub-surface abnormalities in the components. Defect indications appear on the instrument CRT. Eddy current testing is limited to conductive materials. Care must be taken to evade false indications due to part geometry or permeability variations (ferromagnetic materials).
