What term describes the duration that a test part is covered in penetrant?

The duration that a test part is covered in penetrant is referred to as "penetration time." This term specifically indicates the length of time that the penetrant is allowed to remain in contact with the surface of the material being examined. Penetration time is crucial because it directly affects the ability of the penetrant to seep into any surface flaws or discontinuities that may be present.

Different materials and types of penetrants may require varying penetration times to achieve optimal results. Generally, longer penetration times can enhance defect visibility by allowing more penetrant to enter smaller cracks, which can lead to more reliable detection during the inspection process. Understanding this concept is fundamental for performing effective liquid penetrant testing, as it ensures adherence to the specifications and guidelines needed for accurate evaluation of the materials being inspected.