The Analysis of Magnetic Circuit during Magnetic Particle Testing of Parts with Layer and Confirmation of Testing Sensitivity

There are many parts with antirust layer during magnetic particle testing. For layers of different thickness, formulating of magnetizing specification and testing process is however lack of theoretical basis, or is just conformed through reference slice. The influence of layers of different thickness on parts surface magnetic field intensity and testing sensitivity is concluded by experiments. Finally, points for attention during testing parts with antirust layer are summarized.