Magnaflux MPI.
LET US EXCEED YOUR EXPECTATIONS FOR MAGNETIC PARTICLE INSPECTION.
Magnetic Particle Inspection (MPI) is a relatively low cost, yet highly effective non-destructive testing method used to identify surface and near-surface defects in ferrous metal parts or components, including castings, forgings, weldments and machined or stamped parts.
At ATRONA, we conduct fast and efficient wet magnetic particle inspection on a daily basis and employ a systematic approach in accordance with ASTM E1444 guidelines. This process begins before actual testing commences...
MPI PRE-TEST CHECKLIST
- Review provided part specifications and prints to determine if criteria can be met.
- Level II techs develop a technique that meets customer and test specification requirements for proper inspection.
- Technique is reviewed by a Level III inspector and revised/approved as needed.
- Once approved testing can commence.
Following approval of a technique that will meet the customer’s test specification requirements, our certified techs begin testing.
GENERAL 7-STEP INSPECTION PROCESS
- STEP 1 - Clean part as needed with a solvent degreaser so it’s free of oils and contaminants.
- STEP 2 - Secure part between head and tail stock of wet bench machine. Using a “head shot,” a pre-determined amount of electrical current is applied to magnetize the part according to the standard (ASTM E1444). Some test specifications call for multiple head shots.
- STEP 3 - Bathe part in wet flourescent suspension solution that contains iron oxide particles, as an electric current is applied.
- STEP 4 - With the magnetic bench machine enclosed within a darkroom enclosure, UV light is applied to identify indications of any defects that appear in relation to the direction of the magnetic field applied to the part.
- STEP 5 - Depending upon the specific test requirements, one or more “coil shots” may also be applied to the part to identify any discontinuities that run in the opposing direction.
- STEP 6 - Demagnetize the part.
- STEP 7 - Following this thorough visual examination, the part is accepted or rejected, based upon pre-defined criteria. Failed parts are isolated from accepted parts and tagged accordingly.
Let ATRONA exceed your expectations for magnetic particle inspection. Our newly expanded MPI area is designed for optimum work flow with three Magnaflux benches operated by certified techs, thousands of square feet of available floor space to store incoming and outgoing parts, as well as an adjacent ground level dock for ease of access. In addition, as a full-service lab, ATRONA has expert metallurgists on staff available for consultation when issues arise. They can also perform additional testing, if necessary, to assess the severity or root cause of any detected indications.