Penetrant Test

PGF 2019
Taschenbuch der GIESSEREI PRAXIS
Zerstörungsfreie Werkstoffprüfung

Penetrant Test

Dye penetrant test – capillary method

Detection of surface cracks with the help of liquids that, due to the capillary effect, penetrate the finest cracks that are open to the surface of the material being tested and, after treatment with corresponding developer fluids, show these cracks in a clearly visible colouration. Cracks with a width of < 0.001 mm can be detected with this process.

Fluorescent penetration test: This test is carried out with fluorescent penetrants and exposure to ultraviolet light. This makes the cracks easy to detect under low light conditions.

Both processes are particularly well suited for non-magnetisable materials, since methods based on magnetization cannot be applied here.

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2 Pages