Penetrant Testing (PT)

Metod description             

Liquid Penetrant teting metod is used to reveal surface discontinuities by bleedout of a colored or fluorescent dye from the flaw.The technique is based on the ability of a liquid to be drown into a “clean” surface discontinuity by capillary action. Liquid Penetrant testing is one of the most widely used NDT methods.Its popularity can be attributed to two main factors:its relative ease of use and its flexibility. It can be used to inspect almost any materials provided that its surface is not extremely rough or porous.Materials that are commonly inspected using this method include:metals,glass,many ceramic materials,rubber and plastics. Liquid Penetrant testing can  only be used to inspect for flaws that break the surface of the sample (suchas surface cracks,porosity,laps,seams,lack of fusion,etc.) Liquid Penetrant testing can be applied to any non-porous clean materials,metallic or non-metallic,but is unsuitable for dirty or very rough surfaces