Łukasiewicz Research Network – Institute of Aviation

Penetration method

The oldest method of non-destructive testing used to verify both metallic and non-metallic materials. Penetration testing is based on the capillary phenomenon – penetration of the penetrant into very narrow, also hard-to-reach spaces, also against the law of gravity. A very effective and universal method useful for detecting surface defects in materials.

Penetration method – testing capabilities

  • Testing of surface discontinuities of non-porous materials (metallic and non-metallic):
    • steel and its alloys,
    • non-ferrous metals,
    • ceramics,
    • glasses,
    • plastics.
  • Types of detected discontinuities:
    • cracks (e.g. fatigue, grinding),
    • porosity,
    • scratches,
    • delamination,
    • lapping,
    • overlaps,
    • corrosion (point, surface),
    • leaks.

Penetration method – equipment

  • Magnaflux penetration kits,
  • UV and white light illuminators,
  • patterns,
  • UV light and intensity meters.
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