WHAT IS A LIQUID PENETRANT INSPECTION?
Liquid Penetrant Testing is a type of Non Destructive Testing that detects surface imperfections in non-porous materials in both metallic and non-metallic materials.
This type of test basically consists of the application of a liquid with high wetting power on the surface of the material to be tested. Thanks to the capillary effect, it will penetrate the discontinuities.
Finally, the surplus remaining on the surface will be removed by a suitable cleaning system and the subsequent application of a developer will be able to extract the liquid that was previously trapped in the discontinuities, showing the location of the discontinuities.