Which process can ensure that magnetic particles adhere properly during MPT?

Cleaning the surface thoroughly before inspection is crucial for ensuring proper adherence of magnetic particles during Magnetic Particle Testing (MPT). Contaminants such as dirt, grease, rust, or paint can interfere with the ability of magnetic particles to cling to the areas where discontinuities exist. If the surface is not properly cleaned, it could lead to false indications or missed defects, as the magnetic particles may not settle in the areas of magnetic flux leakage.

By removing these contaminants, the magnetic field can penetrate the surface without obstruction, allowing the smallest cracks and flaws to be detected effectively. This preparatory step is essential in achieving accurate and reliable results in MPT, as the quality of the surface condition directly impacts the efficacy of the inspection process.

Other options do not address the critical need for a clean surface. A textured surface could potentially hold some particles better, but it does not guarantee that the magnetic field is properly established or that non-conductive contaminants would not interfere. Applying oil can lead to smearing, which can also hinder particle adherence. Introducing moisture could create issues as well, potentially causing the magnetic particles to clump or disperse unevenly. Therefore, thorough cleaning stands out as the most effective way to ensure that magnetic particles adhere properly.