Magnetic Particles and Dye Penetrants
Liquid Penetrant Inspection (LPI)
Penetrant testing (PT)/ Liquid Penetrant Inspection (LPI) is one of the
oldest and most widely used methods for the detection of surface
discontinuities in nonporous solid materials. From mid 20th century, the
penetrant method has gone through a remarkable development and is now
the most important method for the detection of surface defects and
Penetrant testing will help you find defects that are open towards the
surface, like cracks and surface breaking flaws. The method is suitable
for all non-porous materials such as steel, aluminium, copper, plastics,
ceramics and castings.
Magnetic Particle Inspection (MPI)
Magnetic Particle Inspection (MPI) – also known as
Magnetic Particle Testing (MT) – is a non-destructive testing method for
detecting cracks, surface-breaking flaws and near-surface flaws in
ferromagnetic components and structures.
Ferromagnetic materials – such as iron, nickel and cobalt – are strongly
attracted to a magnet and can easily be magnetised. The magnetic
particles gather around the defect, making it easy to locate and repair.