MPI NDT Inspection Methods
Also known as Magnetic Particle Inspection, it is the technique that uses magnetic particles to detect linear flaws near the surface of ferromagnetic particles, usually used for surface examination.
First, the specimen to be examined is magnetised using a yoke magnet. The magnetic lines will deform or change shape where the defect (crack, void, or leakage) is present.
When sprinkled over the surface, magnetic particles will assemble and bridge the gap over the flawed area. This technique is known for its high resolution and generally applies to iron specimens.
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