Level 4 Post Emulsifiable Fluorescent Penetrant
Essential for critical component applications, ultra-high sensitivity ZL-37 post-emulsifiable penetrant is designed for detecting fine, tight discontinuities in safety-critical components, such as titanium turbine components, and in high-stress parts, such as investment castings.
This Type 1 penetrant is non-water-soluble so there is minimal risk of washing ZL-37 penetrant from a fine or shallow defect which makes this penetrant inspection the most reliable, dependable form of PT testing. ZL-37 has a high flash point and provides long tank life when used in open dip tanks, but this penetrant can also be applied in a variety of other ways, including electrostatic spray.
ZL-37 can be removed with ZE-4E Method B lipophilic emulsifier or ZR-10E Method D hydrophilic emulsifier.
ZL-37 is listed on the QPL SAE AMS 2644 Qualified Product List and is approved for use by Pratt & Whitney.
Container Size & Part Number
Aerosol can, case of 12 01-3188-78
5 gal / 18.9 L pail 01-3188-40
20 gal / 75.7 L drum 01-3188-30
55 gal / 208 L drum 01-3188-45
Defect location: open to surface
- Detecting fine to very-fine discontinuities
- Precision components
- Safety-critical components
- Investment castings
- High-stress parts
- Smooth, machined surface finish
- Non-porous surfaces
- Finding wide, shallow flaws
- Turbine engine blades, disks, etc.
- Immersion dip tank
- Electrostatic spray
- Finished surface cracks
NDT Method: Fluorescent Penetrant Testing
Type: Type 1
Methods: Method B, Method C or Method D
Sensitivity Level: Level 4, ultra-high sensitivity
Required Equipment: UV light source, like the EV6000
Temperature Range: 40 to 125°F / 4 to 52°C