The Basic Magnetic Flux Leakage Principle

MFL testing relies on the fact that when a ferromagnetic material is magnetized, magnetic leakage field will be formed on the surface of the test piece due to the defects on or near the surface. Magnetic flux leakage testing is a very important non-destructive testing method, which is widely used. Combined with other methods, it can provide an efficient and cost-effective evaluation for ferromagnetic materials.
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