Previously we’ve discussed about Liquid Penetrant Testing to detect surface defects in products or assemblies, today we’re going to touch base on another method but only limited to magnetisable metals.
Magnetic Particle Testing (MPT) is conducted in accordance with industry standards such as ASTM E1444 and ASME Section V provide guidelines for performing MPT. This to ensure each test is reliable, repeatable and trusted by customers.
Here’s a simplified overview:
1. Clean the test surface thoroughly to remove any contaminants that could interfere with the inspection.
2. Apply a magnetic field to the material. This can be achieved using a yoke, coil, or other magnetizing methods, depending on the specific requirements.
3. Apply ferrous particles (usually iron or iron oxide) to the surface. These particles are attracted to areas where magnetic flux leaks out due to defects, highlighting potential flaws.
4. Carefully examine the test area for indications, which appear as visible accumulations of magnetic particles. These indications may indicate defects like cracks or discontinuities.
5. Evaluate the indications based on size, shape, and other criteria to determine whether they represent acceptable features or unacceptable defects.
6. Record inspection details, including procedures, equipment calibration, and inspection results. This documentation is essential for quality control and compliance with industry standards.
Compliance with specific standards ensures that Magnetic Particle Testing is conducted consistently and accurately across different industries, contributing to the overall quality and safety of materials and components. That’s a all for now, TTYL.
Cheers 🥂 MFR