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