Magnetic Particle Inspection
Magnetic Particle Inspection "MPI" (also known as Magnetic Testing "MT") is used for the detection of surface and near-surface flaws (such as cracks) in ferromagnetic materials e.g. steel and iron.
A magnetic field can be applied to the item under test by either direct magnetization or indirect magnetization.
- Direct magnetization is when an electric current is passed through the item under test and a subsequent magnetic field is formed within the material.
- Indirect magnetism is when no electric current is passed through the test object, but a magnetic field is applied from an outside source such as a 110v portable electromagnet or permanent magnet.
The presence of a surface or near surface discontinuity causes the magnetic flux to distort or leak. Fine magnetic particles (either dry or suspended in a carrier fluid) are applied to the surface of the item under test. These magnetic particles are attracted to any area of flux distortion or leakage thus creating a clear visible indication to the operator.
The more sensitive techniques of MPI utilise fluorescent magnetic particles which are viewed in a darkened area under a UV (black) light.
Services on offer from Venture:
6000 Amp Magnaflux Bench Unit.
Fluorescent / Colour Contrast techniques in-house and on-site.
Site services offering portable 110v coils, prods and electromagnets.
Comprehensive 24hr in-house and on-site service.
Approved procedures for control checks.
Approved procedures to specific industry standard.
Inspectors fully qualified to PCN & SNT.
Approved Method Statements, Risk Assessments and COSHH Assessments including confined space entry work.
If you require further information on any of these services please Contact us.