Liquid Penetrant testing is probably the most widely used NDT method. The test object or material is first cleaned and then coated with a visible or fluorescent dye solution. After a pre-selected time interval (dwell time), the excess dye is removed from the surface, and then a developer is applied. The developer acts like a blotter and draws penetrant out of imperfections which are open to the surface. With visible dyes, the vivid color contrast between the penetrant and the developer makes the "bleedout" easy to see. With fluorescent dyes, an ultraviolet lamp is used to make the "bleedout" fluoresce brightly, thus allowing the imperfection to be seen readily.

With a wide variety of penetrant materials and a custom made fluorescent penetrant inspection system, we can provide both field and lab, high volume processing of many different parts with both fluorescent and visible penetrants.

Applications

Castings, Forgings,
and Extrusions

Aerospace components made of many different alloys

Weldments

Plastics and Glass

Machined parts

Leak tests

Paper mill suction pressure rolls

Retaining bands
on generator rotors

Stellite overlay on
steam turbine blades

Pump bodies,
valve bodies and seats

Non-magnetic impellers for ships and hydro-electric power plants

Press fit connections