Dye Penetrant Surface Techniques
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Traditionally Dye penetrant may be applied to all non-ferrous materials and ferrous materials, although for ferrous components magnetic-particle inspection is often used instead for its subsurface detection capability.
Liquid Penetrant (LP) is used to detect casting, forging and welding surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks on in-service components.
Low cost method though surface tested should preferably be smooth. However there are steps to follow when applying the techniques we use, which can cater for any imperfections.
