Liquid Penetrant Testing (PT)
Penetrant testing (PT) is an extremely popular test method that can be used on a wide range of materials and part geometries. The most common method 5 Star Testing uses is dye penetrant testing. This is available in a water-washable and solvent based sprays. It is extremely effective at detecting small surface flaws such as cracks and porosity. Water-washable dye penetrant is an extremely cost-effective way to inspect a large quantity of items in a short period of time.
Penetrant testing is commonly used to inspect port openings on recovery boilers, welds, surfaces for stress corrosion cracking, valve components, fan blades, etc.
Below is a penetrant test revealing stress corrosion cracking on the surface of a part.