What material do you inspect in a liquid dye penetrant test?

What material do you inspect in a liquid dye penetrant test?

• A. Surface-breaking discontinuities in nonporous materials
• B. Internal defects below the surface
• C. Porosity in materials
• D. Hidden corrosion

Answer: (A)

Liquid dye penetrant testing is used to reveal surface-breaking flaws on nonporous materials. The dye is applied to the surface, seeps into any cracks or openings that connect to the surface, and after removing excess dye plus a developer, the flaw becomes visible. Because it detects only flaws that break the surface, it won’t reliably show internal defects below the surface, porosity, or hidden corrosion unless those conditions create a surface opening. So the material inspected is surface-breaking discontinuities in nonporous materials.

Liquid dye penetrant testing is used to reveal surface-breaking flaws on nonporous materials. The dye is applied to the surface, seeps into any cracks or openings that connect to the surface, and after removing excess dye plus a developer, the flaw becomes visible. Because it detects only flaws that break the surface, it won’t reliably show internal defects below the surface, porosity, or hidden corrosion unless those conditions create a surface opening. So the material inspected is surface-breaking discontinuities in nonporous materials.