Magnetic Flux Leakage

Magnetic Flux Leakage (MFL) is a magnetic method of NDT that is used to detect corrosion and pitting in steel structures, most commonly pipelines and storage tanks. The basic principle is that a powerful magnet is used to magnetize the steel. At areas where there is corrosion or missing metal, the magnetic field "leaks" from the steel. In an MFL tool, a magnetic detector is placed in between the poles of the magnet to detect the leakage field. CSI analysts interpret the chart recording of the leakage field to identify damaged areas and to estimate the depth of metal loss.


Canyon State Inspection Inc.uses a MFE technologies Mark 4 Tank Floor Scanner, allowing us to scan large tank floors in minimal time. We also utilize the Silverwing MFE Hand Scanner. This machinery allows us to get to locations that the larger MFL equipment can't reach, such as under pipeline or hard to reach locations in tanks. MFL is an on-site inspection only.