Magnetic Particle Testing (MPT)

Magnetic Particle Testing (MPT)

About Course:

Magnetic particle Inspection (MPI) is a nondestructive testing (NDT) process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC) (rectified AC).

The presence of a surface or subsurface discontinuity in the material allows the magnetic flux to leak, since air cannot support as much magnetic field per unit volume as metals.

To identify a leak, ferrous particles, either dry or in a wet suspension, are applied to a part. These are attracted to an area of flux leakage and form what is known as an indication, which is evaluated to determine its nature, cause, and course of action, if any.

Course Highlights:

This training covers both Theory & Practical Training as per written practice of Synergem.

  • Basic of Magnetism
  • Magnetisation Techniques
  • Inspection Mediums
  • Inspection Techniques
  • Indication Classification
  • Test Equipments and Accessories
  • Demagnetisation
  • Selection of Techniques
  • Codes, standards and Procedures
  • Acceptance Standards
  • Manufacturing Process and Discontinuities
  • Interpretation of Indications
  • Preservation of Indications
  • Evaluation of Test Equipment
  • Types of Discontinuities
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