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)
• PE 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

Maximize operator comfort and safety

• Promotes better inspection quality by providing the operator with a more comfortable work environment
• Reduces discomfort from strong odors
• Exceeds all EHS requirements

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

Specifications

• AECL
• AMS 2644
• ASME BPVC
• ASTM E1417
• ASTM E165
• Boeing BAC 5423 PSD 6-46 or 8-4
• Boeing PS-21202
• ISO 3452
• MIL-STD-2132
• MIL-STD-271
• Navsea T9074-AS-GIB-010/271
• Pratt & Whitney PMC 4354
• QPL SAE AMS 2644

Applications

Defect location: open to surface

Ideal for:

• 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.
• Titanium
• Aluminum
• Immersion dip tank
• Electrostatic spray

Defect examples:

• Finished surface cracks
• Seams
• Porosity
• Scratches

Use Recommendations

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