Product Data Sheet – ZYGLO ZL-2C, ZL-27A, ZL-37
Post-emulsifiable Fluorescent Penetrants
ZYGLO® ZL-2C, ZL-27A and ZL-37 are fluorescent post-emulsifiable penetrants designed to be removed from the test part surface by emulsifiers or solvent. Both
Method B lipophilic emulsifier ZE-4B and Method D hydrophilic emulsifier ZR-10E can be used to remove these penetrants. With a UV-A light source, indications will appear as a bright green-yellow fluorescence.
Our post-emulsifiable fluorescent penetrants have a high flash point, and are designed to be used in open dip tanks.
- Bright indications
- Minimal background fluorescence
- High flash point
- Available in medium, high and ultra-high sensitivity
- Immiscible with water, which protects against over-washing and allows the penetrants to separate easily from water.
Defect location: open to surface
- Rough surface finish
A blend of petroleum distillates, oils, alkyl aryl phosphate and fluorescent dyes.
|NDT Method||Penetrant Testing, Fluorescent|
|Storage temperature||10°C to 30°C|
|Usage temperature||5°C to 55°C (bulk); -5°C to 50°C (aerosol)|
|Coverage||20 – 30m² per litre; 10 – 15m² per aerosol|
|Developers||SKD-S2, ZP-4B, ZP-5B, ZP-9F, ZP-14A|
|UV lamps||EV6000, ST700|
|Form and colour||Green-yellow liquid|
|Corrosion||Meets AMS 2644|
|Flash point||> 93°C|
|Sulphur content||< 300 ppm|
|Chloride content||< 300 ppm|
|Fluoride content||< 50 ppm|
|AMS 2644 class||Type 1, Method B/C/D|
|Density||0.89 g/cm³||0.93 g/cm³||0.95 g/cm³|
|Viscosity at 38°C||6.0 mm²/s||9.2 mm²/s||13.5 mm²/s|
|AMS 2644 sensitivity||Level 2 (Medium)||Level 3 (High)||Level 4 (Ultra-high)|
|EN-ISO 3452 sensitivity||–||Level 3 (High)||–|
Like all Magnaflux materials, our post-emulsifiable fluorescent penetrants are closely controlled to ensure batch-to-batch consistency, optimum process control and inspection reliability.
|ASME B & PV Code, Sec V||Yes||Yes||Yes|
|EN ISO 3452-2||–||Yes||–|
|Pratt & Whitney||PMC 4352-2||PMC 4353-2||PMC 4354-2|
|Rolls Royce RRP 58003 (CSS 232)||Yes||Yes||Yes|
|SAFRAN Pr 5000/In 5000||Yes||Yes||Yes|
General Method of Use
Pre-clean the test part and allow to dry. The surface must be free from oil, grease and any other contaminant.
Apply the penetrant by immersion dip, brush, flow on, conventional or electrostatic spray. The test area must be completely covered with penetrant.
Allow contact time of 2 – 5 minutes minimum. 10 minutes should be adequate for most situations, although specific process specifications may require longer – check the controlling process specification (where applicable).
If you’re using a hydrophilic emulsifier, pre-rinse the test part with plain water before applying the emulsifier by spray (hydrophilic) or immersion (lipophilic). Leave for the required length of time then wash with a water spray.
The run-off from a pre-rinse can be treated to separate out the water, which can then be reused for other pre-rinses. Dye penetrant process rinse waters should not be discharged to local authority waterways or sewers without some form of effluent treatment. We can advise on suitable equipment for this purpose; for more information, please contact us.
Dry the test part by placing in a controlled recirculating warm air dryer at a temperature of 50°C – 70°C.
Apply a developer to maximise the sensitivity of the penetrant and to provide a white contrasting background. There are three types of suitable developer:
- Dry powder: Free-flowing, lightweight powders which are applied to the dry component by powder storm, dusting, electrostatic spray or puffer.
- Solvent-based: Quick-drying materials which are applied to the dry component by spraying.
- Aqueous or water-based: Apply before drying by dipping or spraying. Note: To maximise penetrant sensitivity, do NOT leave parts in aqueous developers for any length of time.
Inspect your test part using a suitable UV source. Any defect indications will fluoresce a bright green-yellow when exposed to UV(A) light at a peak wavelength of 365 nm.
If required, you can clean your test part after inspection. Developer residues can be removed either by wiping with a cloth or by a water and detergent wash. Penetrant residues can be removed by vapour degreasing or solvent soak.
Packaging and Part Numbers
Part number 056C079
Part number 056C080
Part number 008A002
Part number 066C017
Part number 066C016
Part number 066C020
Part number 066C019
Health & Safety
Review all relevant health and safety information before using this product. For complete health and safety information, refer to the relevant Safety Data Sheets.