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Dye penetrant chemical is check & detect surface-breaking defects in all ferrous, non-ferrous and non-porous materials (ceramics, plastics or metal). It is used to locate welding, forging & casting surface defects like porosity, hairline cracks, laps, leaks, & other defects.
Posted by Tradeindia user (07-08-2020)
Pre cleaning of the test surface to be inspected means removal of grease, oil, paint, dirt or loose scale so that they could not cause false or irrelevant inductions.