Magnetic flux leakage (MFL) is a magnetic method of nondestructive testing 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. An array of sensors is positioned between the magnet poles to detect this flux leakage. In an MFL tool, a magnetic detector is placed between the poles of the magnet to detect the leakage field.

Analysts interpret the chart recording of the leakage field to identify damaged areas and hopefully to estimate the depth of metal loss. Its focuses mainly on the tank floor examination are provided at the end.

The Benefits of MFL is possible to detect common defects such as corrosion pitting and irregular general corrosion while also accurately sizing large uniformly corroded areas and laminations.