Axis NDT

Penetrant Inspection

Penetration Inspection

Penetrant Inspection is a Non-destructive method of testing where by a penetrant is applied to the surface of a part by means of spraying, brushing or submerging. The penetrant is left for a period known as ‘dwell time’. Once the required dwell time has passed, excess penetrant is removed to leave a clean surface. A developer is then added to the surface which works as a contrast to the penetrant.

Penetrant inspection can be used in several sensitivity levels, visible or fluorescent, solvent removeable or water washable and post emulsification.

Parts that can be inspected are:

  • Butt and Fillet welds all materials
  • Storage tanks and pipework
  • Machined metallic parts such as Aluminium, Austenitic stainless steel, copper, bronze, brass
  • Plastics
  • Glass
  • Vitrified ceramics