Magnetic particle inspection (MPI) is a nondestructive testing (NDT) method that does not harm the inspected parts. MPI is a cost-effective and reliable testing method commonly used to identify surface and slightly subsurface discontinuities in ferromagnetic materials.
In this brochure we cover:
In this article, we look at how perception and neighboring objects can have a significant,
but currently unmeasured, impact on the probability of detection.
14A magnetic powder is made with a carefully optimized range of particle shapes and sizes that allow particles to move quickly and easily to indications without clumping. 14A is also designed with strong fluorescence to minimize background, which results in faster inspections with better reliability and greater confidence.
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by David Geis, Product Manager, and Brian Batteiger, NDT Services Manager
There are many different types of magnetic particle equipment, ranging from small portable power packs to wet bench units, all the way to high-amperage stationary power packs for large structures.
If you are following ASTM E1444, ASTM E3024, ISO 9934, or Nadcap AC7114/2, your equipment must be calibrated on a semi-annual basis. No matter what type of magnetic particle equipment you have, and no matter which specification you follow, the same five steps are used to perform equipment calibration.
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.
A super bright LED attachment is available as an optional item to help illuminate the inspection area while simultaneously magnetizing the part. All-in-one Kits are also available, including #1 Gray and #8A Red magnetic powders, a yellow paint marker, and cleaning cloth, for a full inspection kit in one convenient carrying case.
The operating temperature range for penetrant inspection as specified in ASTM E1417 Standard Practice for Liquid Penetrant Testing is 40°F to 125°F (4°C to 52°C), but how is the penetrant inspection affected at temperatures below 40°F (4°C) and can the inspection process be adjusted to achieve acceptable results?
To answer these questions, we evaluated SKC-S cleaner/remover, SKL-SP2 solvent removable dye penetrant and SKD-S2 non-aqueous developer at a range of temperatures in order to figure out what NDT inspectors can expect when using these, or similar quality dye penetrant products when inspecting at lower temperatures
At lower temperatures in the range of 32°F – 50°F (0°C – 10°C), the solvent cleaner will take longer to dry.
We used 75°F (24°C) as our ambient, standard operating temperature, and observed how decreasing temperatures impacted how quickly the solvent cleaner dried. Below are our suggested drying time for solvent-based cleaner/removers at lower temperatures.
