Magnetic participle inspection
Magnetic participle inspection has been specially developed for the examination of ferromagnetic materials. These are materials which can be magnetised. First of all, a white contrast paint is sprayed on the parts to be examined, so that the discontinuities can be observed well. Then the examination is carried out on the basis of a special magnet ink and a yoke. Hereby a magnetic field is generated in the material to be examined and a discontinuity will disturb the magnetic field. The black magnetic ink consists of ink with magnetisable iron particles which will accumulate at the place of the discontinuity. Because of the white contrast paint this discontinuity will be clearly visible.