Magnetic Particle Inspection (MPI) (MT)
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LIMITATIONS OF MAGNETIC PARTICLE INSPECTION
LIMITATIONS OF MAGNETIC PARTICLE INSPECTION
• The specimen must be ferromagnetic (e.g. steel, cast iron)
• Paint thicker than about 0.005″ must be removed before inspection
• Post cleaning and post demagnetization is often necessary
• Maximum depth sensitivity is typically quoted as 0.100″ (deeper under perfect conditions)
• Alignment between magnetic flux and defect is important
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