Liquid Penetrant Testing (PT)

Liquid Penetrant Testing (PT) is a non-destructive method used to detect surface flaws or cracks in materials. A liquid with high surface tension is applied to the clean, dry surface of the object, entering any tiny cracks or defects. After a pause to allow penetration, excess liquid is removed, and a developer is applied, which draws out the penetrant from flaws, creating visible markings. This process helps inspectors identify surface defects without damaging the part, ensuring it meets safety and quality standards. PT is widely used in industries like aerospace, automotive, and manufacturing for quality control.