Alternating Current Field Measurement (ACFM)

The ACFM technique is an electromagnetic non-contacting technique which has been developed to be able to detect and size surface breaking defects in a range of different materials and through coatings of varying thickness. The basis of the technique is that an alternating current flows in a thin skin near to the surface of any conductor. When a uniform current is introduced into the area under test if the area is defect free the current is undisturbed. If the area were to have a crack present then the current would flow around the ends and the faces of the crack. A magnetic field is present above the surface associated with this uniform current and this will be disturbed if a surface-breaking crack is present.

Alternating Current Field Measurement (ACFM) Inspection is a service provided by NDTrak, a Paragon Integrity Solutions company. ACFM can establish the length and depth of defects of longitudinal and transverse defects while inspecting ferrous and non-ferrous metals ranging in temperatures from 0 – 900 degrees without removing coatings. ACFM encoded data is recorded and provides an auditable permanent record. Please contact NDTrak for a technology demonstration at your location.

• Eliminates the need to remove the coating in order to inspect
• Allows 24/7 Inspection Activity
• No Interference to other Construction/Operation Activities
• Instant Test Results
• Portable
• Extremely Sensitive
• Requires access to one side only
• Provides Auditable, permanent record

AMIGO ACFM Test Unit

 

NDTrak ACFM Technicians are all ASNT Level II certified as a minimum, and ultilize state of the art ACFM test equipment from TSC Inspection Systems, as well as other state of the art NDT test equipment manufaturers