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ZL-15B water washable penetrant is a low-sensitivity penetrant that features excellent washability. It is used to find open surface flaws such as cracks and porosity in seams, laps, cold shuts, and laminations on castings, forgings, extrusions, and parts with rough surfaces.
It can be developed with ZP-4D dry powder developer, with ZP-5B water suspendible developer in an agitated tank or with ZP-9F non-aqueous developer. With a UV-A light source, like the EV6000, indications will appear as a bright green-yellow fluorescence.
ZL-15B is listed on the QPL SAE AMS 2644 Qualified Product List.
Penetrant TypeType 1
Fluorescent Penetrant SensitivityLevel 1/2 - Very Low Sensitivity
Penetrant MethodsMethod A, Method C
Removal TypeWater Washable
Required EquipmentUV light source
Ideal ApplicationCastings, Cold shuts, Forgings, Laminations, Laps, Rough surface finish, Seams
Defect ExamplesCold shuts, Cracks, Delamination, Porosity, Seams
StandardsAECL, AMS 2644, ASME, ASTM E1417, Boeing BAC 5423 PSD 6-46 or 8-4, Boeing PS-21202, NAVSEA T9074-AS-GIB-010/271, QPL SAE AMS 2644
Dry powder developer for Form a penetrant testing and QPL SAE AMS 2644 approved.
Water suspendible developer for Form c penetrant testing, QPL SAE AMS 2644
Solvent-based developer for Type 1 Form d or Type 2 Form e penetrant testing, QPL SAE AMS 2644
Portable, handheld LED UV lamp for black light inspection during fluorescent PT or MT testing
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