What is the first step involved in a dye penetrant inspection?

The initial step in a dye penetrant inspection is to ensure that the surface of the part is properly cleaned. This cleaning process is crucial because any contaminants, such as oil, dirt, rust, or paint, can obstruct the penetration of the dye into any existing cracks or defects in the material being tested. If the surface is not cleaned adequately, the dye may not reach potential flaws, leading to inaccurate results in the inspection. Ensuring a clean surface allows for optimal performance of the dye, ensuring that any indications of defects are clearly visible during the inspection process.