Magnetic Particle Examination
The magnetic particle examination technique detects surface and slightly sub-surface indications. While providing a magnetizing force over the test area of the component, the inspector sprays a suspension of colorized iron filings (either dry or wet fluorescent) within the magnetized area. The iron filings align themselves along the artificial magnetic fields created by any defects. The process is simple to use and some methods do not require extensive training. The test surface should be completely cleaned before applying the magnetic particles. Many components require demagnification after testing.
