What is a typical procedure involved in magnetic particle inspection?

In magnetic particle inspection, the process is designed to identify surface and near-surface discontinuities in ferromagnetic materials. The correct answer encompasses the fundamental steps of this non-destructive testing method.

Initially, magnetization is performed, where the part being inspected is subjected to a magnetic field, either by using an electromagnetic coil or permanent magnets. This step is crucial for producing a detectable magnetic field in the material, which helps to highlight any discontinuities.

Next, the application of magnetic particles occurs. These particles are typically made of iron oxide and are applied to the surface while the part is magnetized. The particles will be attracted to the areas where the magnetic flux is disrupted, such as cracks or other flaws, creating a visible indication.

Finally, evaluation involves carefully inspecting the part to analyze the patterns formed by the particles. Inspectors look for signs that indicate flaws, which can then be documented for further action if necessary.

This comprehensive process—magnetization, application of particles, and evaluation—ensures an effective and reliable means of detecting defects, making it a core procedure in magnetic particle inspection. Other options, while they may contain elements related to inspection, do not encompass the full procedure used in magnetic particle inspection.