Alternative Current Field Measurement (A.C.F.M)

CFM is an electromagnetic testing capable of detecting and sizing surface – breaking cracks in metals. The basis of the technique is that an alternating locally uniform current is induced to flow in the component being tested. Defect detection and sizing is based on the disturbance of uniform current due to the surface breaking cracks.

Technique capability:

  • Length & depth of the defect can be measured accurately paint and other protective coatings several millimeters can be left on,
  • The primary advantage is that little or no surface preparation is need for a test.
  • All data can be stored for audit