Alternating Current Field Measurement (ACFM)

Originally developed for inspection of fatigue cracking, ACFM is an advanced technique for detecting surface cracks and pinpointing the location, length and depth of the defect. This rapid, one-pass ET method does not require extensive cleaning of the work piece or electrical contact.

Unlike Dye Penetrant (PT) and Magnetic Particle Testing (MT), ACFM works through paint and coatings and in a wide range of temperatures. Applications include painted or coated piping, process vessels, structural frameworks, bridges, cranes, axles and ship hulls. Results are automatically recorded and accepted by certification authorities.