Liquid Penetrant Inspection
Water Washable Liquid Penetrant Inspection
- A liquid with high surface wetting characteristics is applied to the surface of the part and allowed time to seep into surface breaking defects
- The penetrant used is often loaded with a fluorescent dye and the inspection is done under UV light to increase test sensitivity
Solvent Removable Penetrant Inspection
- A spray penetrant is applied to the inspection area
- The excess penetrant is removed from the surface of the part with the help of a solvent based remover.
- A developer (powder) is applied to pull the trapped penetrant out the defect and spread it on the surface where it can be seen
