Magnetic Flux Leakage (MFL-3d Version)

Magnetic flux leakage (MFL) is a non-destructive magnetic testing method used to detect corrosion, pitting, and wall loss in steel structures.

Magnetic flux leakage (MFL) is a technique commonly used in the petrochemical industry for inspecting tank floors. Corrosion of the tank floor can result in product loss and environmental damage. As a result, tank floor inspections are critical in order to prevent the occurrence of such problems.

MFL inspects tank floors at a low cost and at a high speed. Our certified MFL inspectors have years of experience. MFL equipment such as the Floormap VS2i and Floormap 3D are used. The method magnetizes the tank floor with permanent or electromagnets, and the resulting magnetic field changes are recorded and analyzed. If the tank floor has corrosion, pitting, or wall loss, the magnetic field ‘leaks’ and the ‘leakage’ is analyzed to determine the location and severity of the defect – both near and far surface. A map of the corroded areas is provided with the MFL method and this essential data can be stored for future reference and planning.


  • Determining Corrosion Growth Accurately and Reliably.
  • Magnetic flux leakage as applied to above ground storage tank flat bottom tank floor inspection.
  • Maximum coverage, including critical zone
  • High-resolution for increased Probability of Detection
  • Multi-technology for top and bottom defect discrimination