Advantages of Magnetic Particle Testing:
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Quick inspection with minimal surface preparation needed compared to PT
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Detects surface and slightly subsurface flaws
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Indication of flaw is produced directly on the surface of the piece and forms a visual image of the discontinuity
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Easily portable and equipment costs are low
Limitations of Magnetic Particle Testing:
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Can only be used on ferromagnetic materials e.g. carbon steel
- Limited to surface breaking or near-surface flaws
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Proper alignment of magnetic field and flaw is critical
