Magnetic Particle Testing Technique

Magnetic Particle Testing Technique

Some of the most common techniques include:

  • Wet horizontal: This is the most common technique used for MPT and involves applying a liquid suspension of particles to the surface of the component and applying a magnetic field. The particles will congregate at the location of the defect, making it visible to the inspector.


  • Dry powder: This technique involves applying a dry powder of particles to the surface of the component and applying a magnetic field. The particles will congregate at the location of the defect, making it visible to the inspector. This method is typically used for inspecting large or complex components that are difficult to access.


  • Wet vertical: This technique involves immersing the component in a liquid suspension of particles and applying a magnetic field. The particles will congregate at the location of the defect, making it visible to the inspector. This method is typically used for inspecting large or complex components that are difficult to access.


  • AC yoke: This technique involves applying an AC magnetic field to the component and using a yoke to create a magnetic field that is perpendicular to the surface of the component. The particles will congregate at the location of the defect, making it visible to the inspector. This method is typically used for detecting small or shallow defects.


  • Prod method: This technique is used to inspect long and small diameter pipes, bars or wires. The magnetic field is generated by a coil that is wrapped around the component, and the particles are applied to the surface of the component.

Magnetic Particle Testing Technique

It’s important to note that the choice of technique will depend on the specific application, the type of component being inspected, and the size and location of the defects.

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