Liquid Penetrant testing is probably the most widely used NDT method. The test object or material is first cleaned and then coated with a visible or fluorescent dye solution. After a pre-selected time interval (dwell time), the excess dye is removed from the surface, and then a developer is applied. The developer acts like a blotter and draws penetrant out of imperfections which are open to the surface. With visible dyes, the vivid color contrast between the penetrant and the developer makes the “bleedout” easy to see. With fluorescent dyes, an ultraviolet lamp is used to make the “bleedout” fluoresce brightly, thus allowing the imperfection to be seen readily.
With a wide variety of penetrant materials and a custom made fluorescent penetrant inspection system, we can provide both field and lab, high volume processing of many different parts with both fluorescent and visible penetrants.
RNDT Inc. provides nondestructive testing, industrial radiography, magnetic particle testing and more. RNDT, Inc. is an A2LA ISO-17025 accredited commercial testing laboratory headquartered in Johnstown, PA. Our field & laboratory services are offered to all industries. RNDT provides nondestructive testing in the form of industrial x-ray testing (industrial radiography), positive material identification (PMI), liquid penetrant, magnetic particle and ultrasonic testing and visual (CWI) inspections to most all industries.
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