Magnetic Flux Leakage (MFL or Transverse Field Inspection technology) is a magnetic nondestructive testing method used to detect corrosion and pitting in steel structures, most commonly pipelines and storage tanks. The basic principle is to use a strong magnet to magnetize the steel. Magnetic field "leaks" through the steel in areas where there is corrosion or missing metal. In an MFL vehicle, a magnetic detector is placed between the poles of the magnet to detect the leakage field. MFL Professionals interpret a graphic record of the leak area to identify damaged areas and estimate the depth of metal loss.

It is widely used to detect metal loss due to corrosion for pipelines and Tank bottom.

AKIN NDT provides this service with its MFL devices and expert teams in its device park.