Click image to enlarge

ZL-37

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.

Benefits

Improve indication detection in the most critical applications

Creates the clearest, brightest indications for even the finest flaws due to very strong UV and thermal stability
Highest fluorescent brightness of any Level 4 penetrant for high-contrast indications that are easy for inspectors to see – even when the indications are very small
Indications stand out more since background fluorescence is minimized; emulsifiers only remove surface penetrant without the risk of over-washing

Maximize penetrant inspection process control

Prevents over-washing since ZL-37 cannot be removed with water (unless combined with an emulsifier)
Post Emulsifiable penetrant system is less susceptible to human error since only surface penetrant is removed in the final rinse stage

Wide range of inspections

Inspect a wide range of high-value components without fear of corrosion or specification non-conformance
Meets all major industry and NDT specification requirements, including Aerospace Prime and OEM specs, AMS 2644 and ISO 3452

Features

Level 4 ultra-high sensitivity
Post emulsifiable
Bright, high-contrast indications
Resists over-washing or over-removal
High flash point
Wide range of application methods
Low odor

Very low toxicity
Alloy compatibility
Very high thermal resistance
Very high UV stability
High dye content
QPL SAE AMS 2644 Qualified Product List
Approved for use by Pratt & Whitney

Ordering Information

Aerosol can (case of 12)01-3188-78

5 gal / 18.9 L01-3188-40

20 gal / 75.7 L drum01-3188-30

55 gal / 208 L drum01-3188-45

Product Properties

NDT TypeFluorescent Penetrant Testing

Penetrant TypeType 1

Fluorescent Penetrant SensitivityLevel 4 - Ultra-High Sensitivity

Penetrant MethodsMethod B, Method C

Removal TypePost Emulsifiable

Required EquipmentUV light source

Applications

Ideal ApplicationAluminum, Detecting fine to very-fine discontinuities, Electrostatic spray, Finding wide, shallow flaws, High-stress parts, Immersion dip tank, Investment castings, Non-porous surfaces, Precision components, Safety-critical components, Smooth, machined surface finish, Titanium, Turbine engine blades, disks, etc.

Defect ExamplesFinished surface cracks, Porosity, Scratches, Seams

Compliance

StandardsAECL, AMS 2644, ASME BPVC, ASTM E1417, Boeing BAC 5423 PSD 6-46 or 8-4, Boeing PS-21202, ISO 3452, NAVSEA T9074-AS-GIB-010/271, Pratt & Whitney PMC 4354, QPL SAE AMS 2644