Magnetic Particle Inspection is a non-destructive
testing(NDT) process for detecting
surface and slightly subsurface
discontinuities in ferromagnetic materials such as iron,nickel,cobalt
and some of other alloys.
Advantages:
It is quick and relatively uncomplicated
It gives immediate indication of defects
It shows surface and near surface defects, and these
are the most serious ones as they
concentrate stresses
The method can be adapted for site or workshop use
It is inexpensive compared to radiography
Large or small objects can be examined
Elaborate pre-cleaning is not necessary
Disadvantages:
It is restricted to ferromagnetic materials
It is messy
Most methods need a supply of electricity
It is sometimes unclear w
hether magnetic field is strong
The method cannot be used if thick paint coating is present
Applications:
The principal industrial uses of magnetic article
testing are final inspection,receiving
inspection ,in process inspection and
quality control ,maintenance and overhaul in transportation industries, plant
and machinery maintenance and inspection of large components.
How
does Magnetic Particle Inspection Work?
A ferromagnetic test specimen is magnetized with a
strong magnetic field created by
a magnet or special equipment.if specimen has discontinuity ,discontinuity will interrupt the
flowing through specimen and leakage field will occur.
In conclusion, magnetic
particle Testing can be a useful nondestructive
testing during new construction and inservice inspections. It can only be used
on ferromagnetic materials; therefore, it is not the best method for all
applications. For quick, low-cost inspections, MT is often the best NDE method
for detecting surface and slightly subsurface discontinuities.
Blitz academy offers
best Magnetic Particle Testing Course (MT)in Kerala with ISO Certification. For
more details, visit our website .
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