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, glass,
  • plastics;
• types of detected discontinuities:
  • cracks (e.g. fatigue, grinding),
  • porosity,
  • scratches,
  • delaminations,
  • lappings,
  • overlaps,
  • corrosion (point, surface),
    
  • leaks.
    

Penetration method – equipment

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