Magnetic Particle Testing Magnaflux
Carmina Piette
Magnaflux magnetic particle inspection (MPI) testing equipment is designed to be fast, reliable and high-value. Versatile and durable for industrial environments, Magnaflux wet benches, magnetic yoke and power pack come in a range of outputs, including AC, half-wave DC and full-wave DC. Magnaflux MPI equipment can be sized for specific test parts and to accommodate almost any size part.
The Magnavis7 Y- 7 AC/DC Magnetic Particle Yoke is designed for one-person portable magnetic particle inspections of ferrous parts. Ideal for inspection of welds and other remote testing. Articulating, double-jointed legs of yokes contour to any part shape to assure good contact.
Apply magnetic current: For dry, continuous method the magnetic current is started before magnetic powder is applied and the magnetic current is terminated only after magentic particle application is complete.
Apply magnetic particles: Brian demonstrates dry magnetic particle application, continuous method by apply the mag particles to the part while applying the current and gently removes the excess magnetic powder while the current is still being applied.
Additional magnetization: Depending on the part and the process, additional magnetization may be required to find indications in different orientations on the part or test surface. In this case, repeat steps 2-5 for the additional magnetization.
Just like all nondestructive testing methods, the results of a mag particle inspection are only reliable if the testing is performed accurately and consistently. This is meant to provide a general overview of a typical MT / MPI process; all NDT testing must be performed in accordance with the prescribed specifications or test procedures.
#1 Gray provides strong contrast on most metal surfaces during dry method mag particle testing in visible light. It is ready-to-use for visible light flaw detection of surface and slightly subsurface discontinuities in ferrous metals.
It can be used in a powder blower or shaken from a bottle during magnetization, and blown off while current is still being applied. On material with a high magnetic retentivity, indications can still be formed after the current has been turned off.
Ideal ApplicationCastings, Dark surfaces, Detecting medium, large and course discontinuities, Extreme temperatures, Field testing, Forgings, In-service inspections, Large parts, Light, medium, dark surfaces, Rough/textured surfaces, Spot inspections, Weld testing
A highly-sensitive water-based magnetic particle fluid for non-fluorescent (visible) wet method magnetic particle testing to locate fine and medium discontinuities on finished parts. MV-740 provides clear, strong indications due to the heavy buildup of the highly magnetic particles. The product is ready-to-use, so no dilution is required.
These test pieces for magnetic particle inspection will help you maintain your mag particle process by verifying magnetic particle performance. Use to check for mag particle deterioration, to compare different magnetic powders, to verify sensitivity or visibility or to assure field direction and strength.
Flexible indicators used to detect directional orientation during the magnetic particle testing process. Each indicator contains three milled slots with widths of .0075", .009" and .010" that share a common depth.
The indicators are manufactured from permeable magnetic steel sandwiched between two brass plates and designed for repeated use in setting and monitoring magnetic field strength in wet and dry MPI applications.
Quantitative Quality Indicators (QQI) are magnetic particle test piece shims with artificial defects used to verify field direction and relative strength. QQIs are also used to balance multi-directional fields and to increase productivity by minimizing magnetizing shots. The QQI indicator shims are packaged in sets of five.
The AS-5282 Tool Steel Ring (formerly Ketos Ring) is a magnetic particle test piece with pre-drilled holes to simulate subsurface discontinuities. It offers a reliable method of verifying magnetic particle system performance when actual test parts with discontinuities are not available.
7HF provides clear, strong indications due to the heavy buildup of the highly magnetic particles. The convenient aerosol packaging is ideal for field testing, spot inspections and places where bulk processing is impractical, and the wide spray pattern makes it easy to cover large areas for faster processing during remote inspections of tubing, piping and large structures.
The Y-2 is an AC electromagnetic yoke, ergonomically designed to improve productivity and reduce operator arm and wrist fatigue. The yoke generates a strong AC magnetic field for the detection of surface indications during magnetic particle testing.
Lightweight with an ergonomic grip and trigger, the Y-2 is designed for the rugged demands of field inspection. Featuring a field swappable cord and isolated trigger switch; the Y-2 is easily serviceable because a severed cord should not stop a job from getting done.
This fast drying paint aerosol sprays on evenly, without flaking, before inspection so when non-florescent / colored magnetic particles are applied, the indications appear clearly against the opaque white background.
7C Black is a highly-sensitive magnetic particle powder for nonfluorescent (visible) wet method magnetic particle testing. Particle suspensions prepared with 7C Black provide clear, strong indications and are ideal for locating fine and medium discontinuities on finished parts.
Ideal ApplicationDetecting fine and medium discontinuities, Difficult to reach areas, Field testing, In-service inspections, Light surfaces, Machined parts, Reflective or light-colored surfaces, Spot inspections
WA-2B is a general-purpose water-conditioning powder to enhance surface wetting and magnetic particle dispersion stability in water-based magnetic particle suspensions. Its unique blend of wetting agents, corrosion inhibitors and anti-forming agents eliminates the need for additional water conditioning agents.
A white granular powder that is added to water baths in wet method magnetic particle testing with no further bath treatment required. WA-2B features good surface wetting and particle dispersion, and will not cake in storage. WA-2B is added to the water bath and stirred until dissolved before the magnetic particles are added.
Magnaflux Magnetic Particle Inspection Kit
The Mag Kit is a sectional magnetic particle testing system designed for low volume non-destructive testing. It has the operational benefit of a magnetic wet bench but circumvents the significant investment of a production-level mag bench.
Using a P-series portable power pack as a power supply, the Mag Kit is an economical, easy to operate alternative to more expensive, higher volume bench units when the processing of high-volumes isn't a priority. It provides the same level of inspection dependability in a lower volume, lower cost equipment package.
Optional add-ons include a recirculating Mag Kit Spray System with 5 gal / 18.9 L capacity to apply magnetic particle bath pump and a Mag Kit Hood to enclose the Mag Kit bench for darkened fluorescent magnetic particle inspections.
The Y-8 is a battery-powered, DC electromagnetic yoke designed to stand up to the most rugged applications. True portability for magnetic particle inspection in the field and remote locations is achieved through a compact battery pack which provides a full 8-hour shift of inspection power.
Featuring sealed chemical-resistant construction and articulating legs to contour to any part shape, the Y-8 MV Kit comes with a Y-8 yoke, universal-voltage battery charger, global plug adapters, #1 Gray magnetic powder, a paint marker and hand cleaner towels in a convenient carrying case.
A highly-sensitive oil-based magnetic particle aerosol for nonfluorescent (visible) wet method magnetic particle testing to locate fine and medium discontinuities on finished parts. 7HF provides clear, strong indications due to the heavy buildup of the highly magnetic particles.
The convenient aerosol packaging is ideal for field testing, spot inspections and places where bulk processing is impractical, and the wide spray pattern makes it easy to cover large areas for faster processing during remote inspections of tubing, piping and large structures.7HF is often used with WCP-2 white contrast paint to improve contrast and inspection sensitivity.
International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.
In this guide, we will use the terms magnetic particle inspection and magnetic particle testing and other permutations like magnetic particle inspection test interchangeably, following the alternate terms listed above.
Magnetic particle inspections work by running a magnetic current through the material that is being inspected. When the current is interrupted by a defect magnetism spreads out from that point, indicating its presence and allowing inspectors to identify its location in the material.
[NDT magnetic particle testing is just one of the non-destructive testing methods that inspectors use. Learn more about NDT and the other methods used in this guide.]
If the magnetized object has no defects, the magnetic field will transfer throughout the material without any discontinuities or interruptions. But when the current encounters defects in the material it will be interrupted, causing it to spread out from that point and create what is called a flux leakage field where the defect is located.
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