Description
ZL-37 - Post-emulsifiable Fluorescent Penetrant - Level 4
ZL-37 is an ultra-high-sensitivity, post-emulsifiable fluorescent penetrant designed to detect fine, narrow discontinuities, essential for critical component applications. Common parts for this test procedure include titanium turbine components, critical high-stress components, and castings. Under a UV-A ultraviolet light source, the indications will appear as a bright yellow-green fluorescence. ZL-37 has a high flash point and is designed for use in open immersion tanks. To remove ZL-37 penetrant from the surface of an inspection area prior to developer application, a Method D hydrophilic emulsifier, ZR10B, is required. ZL-37 can be used with ZP-4B dry powder developer, ZP-14A water-soluble developer in a non-agitated tank, ZP-5B water-suspended developer in a stirred tank, or ZP-9F non-aqueous developer. The ZL-37 is included on the SAE AMS 2644 Qualified Products List (QPL) and is approved for use by Pratt & Whitney.
Benefits
- Glossy, high-contrast indications
- Resists excessive washing
- High flash point
- Qualified Product List (QPL) SAE AMS 2644
- Approved for use by Pratt & Whitney
Accordance
- AECL
- AMS 2644
- ASME
- ASTM E1417
- ASTM E165
- BOEING BAC 5423 PSD 6-46 OU 8-4
- BOEING PS-21202
- ISO 3452
- MIL-STD-2132
- MIL-STD-271
- NAVSEA T9074-AS-GIB-010/271
- NBR NM 334
- PETROBRAS N-2370
- PETROBRAS N-1596
Application
| Defect Location |
Open to the surface |
| Ideal Applications |
Precision Components, High Stress Parts, Smooth Machined Surface Finish, Non-Porous Surfaces, Castings, Turbine Blades and Parts, Critical Components |
| Examples of Defects |
Finished surface cracks, chips, porosity, scratches |
Product Properties
| Flash Point |
> 93°C |
| Density |
980 g/L (8,15 lb./gal.) |
| Viscosity at 38°C |
13,71 cSt |
| NPE-free |
Yes |
Usage Recommendations
| NDT Method |
Penetrant, fluorescent testing |
| Type |
1 |
| Method (s) |
B / C / D |
| Sensitivity Level |
4, ultra-high sensitivity |
| Necessary Equipment |
UV light source |
| Temperature Range |
4 to 52 °C |
