BDNDT Provide Magnetic Particle Testing (MPT) or Magnetic Particle Inspection (MPI) Service in Bangladesh. Basically boiler Magnetic Particle Testing (MPT) or Magnetic Particle Inspection (MPI), is a non-destructive testing method used to detect surface and subsurface discontinuities in ferromagnetic materials, including iron, nickel, cobalt, and alloys made from these materials. This technique involves passing a high-amperage, low-voltage current through the part to establish a magnetic field. Discontinuities such as cracks and defects with different magnetic properties than the surrounding material cause distortion by interrupting the magnetic field, indicating the shape and position of the flaw. You can also visit our comprehensive MPI guide for more information on Magnetic Particle Inspections.
Why Use Magnetic Testing for Non Destructive Testing?
MPI is a reliable and efficient method for detecting a range of discontinuities, including cracks, porosity, and inclusions. It is also a relatively cost-effective metal testing method, making it a preferred inspection choice for products in many industries, including automotive parts, machinery, aircraft components, steel and iron casting, and more.
An MPI inspection comprises several steps:
Pre-cleaning
Demagnetisation, if necessary
Application of a background contrast paint if necessary
Magnetisation
Application of magnetic particle powders or inks
Inspection of surfaces for indications of flaws
Demagnetisation, and re-magnetisation by another method if necessary
Recording flaws, if any
Demagnetisation, if necessary
Cleaning and protecting
There are several methods of magnetic particle inspection (MPI). Site methods, utilising portable equipment, include:
Permanent magnet
Electromagnetic Yoke
Current flow probes
Flexible coil
Adjacent cable
