Product Data Sheet
ZYGLO ZL-2C
ZYGLO ZL-27A
27A
ZYGLO ZL-37
POST EMULSIFIABLE
FLUORESCENT PENETRANTS
General Description
Zyglo ZL-2C, ZL-27A, ZL-37
37 are general purpose post emulsifiable fluorescent penetrants used for a wide range of medium to
high sensitivity applications.
They all exhibit outstanding penetrating and indication stability characteristics which provides for maximum reliability in
locating surface-open flaws and discontinuities They are safe to use on most engineering and aerospace alloys including
aluminium, steel, nickel and titanium.
These post emulsifiable (post removable) penetrants are formulated to be immiscible with water. This property guards against
agains
over-removal
removal from defects by over washing, and allows the penetrant to separate readily from water, making effluent clean up
easier.
ZL-2C, ZL-27A and ZL-37
37 are used in conjunction with a hydrophilic remover or lipophilic emulsifier to render them washable
washa
with water.
The penetrants fluoresce a bright green-yellow
yellow when exposed to ultraviolet radiation (UV-A)
(UV A) peak wavelength of 365 nm, and
should therefore be used with a suitable UV source such as the Magnaflux ZB-100F or Magnaflux ZB-100-LED.
ZB
Applications
ZL-2C, ZL-27A and ZL-37
37 are typically used on castings, turbine components, welds, forgings, and rough and machined
surfaces to find cracks, seams, laps, laminations and porosity.
Composition
ZL-2C, ZL-27A and ZL-37
37 contain a blend of petroleum distillates, oils, alkyl aryl phosphate and fluorescent dyes.
Product Data Sheet Zyglo ZL-2C,
ZL
ZL-27A, ZL-37 page 1
Product Data Sheet
Typical Properties (not
ot a specification)
Property
Colour
Odour
Flash point
Density
Viscosity @ 38 °C
Corrosion
Sulfur content
Chloride content
Fluoride content
Sodium content
AMS 2644 class
AMS 2644 sensitivity
ZL-2C
Yellow/green
Bland
> 93 °C
3
0.89 g/cm
6.0 cS
Meets AMS 2644
< 300 ppm
< 300 ppm
< 50 ppm
< 100 ppm
Type 1 Method B/D
Level 2 – medium
ZL-27A
Yellow/green
Bland
> 93 °C (bulk product)
3
0.93 g/cm
9.2 cS
Meets AMS 2644
< 300 ppm
< 300 ppm
< 50 ppm
< 100 ppm
Type 1 Method B/D
Level 3 – high
ZL
ZL-37
Yellow/green
Bland
> 93 °C
3
0.95 g/cm
13.5 cS
Meets AMS 2644
< 300
00 ppm
< 300
00 ppm
< 50 ppm
< 100 ppm
Type 1 Method B/D
Level 4 – ultra high
Like all Magnaflux materials, Zyglo ZL-2C,
2C, ZL-27A
ZL
and ZL-37 are closely controlled to provide unique batch to batch
consistency and uniformity to assure optimum process control and inspection reliability.
Benefits
Wide range of medium to high sensitivity applications
Immiscible with water – guarding against over-removal
over
as a result of over washing
General Method of Use
1.
2.
3.
4.
5.
6.
Pre-clean the test part
Apply penetrant to the cleaned test part and allow contact time
When using hydrophilic emulsifiers pre--rinse the test part using a water spray
Dip the test part in the emulsifier for a predetermined time
Remove the excess penetrant by spraying the test part with clean water
Dry, develop and then inspect using a UV light source
Pre-cleaning
Test parts must be clean and dry, and free from oil,
oil grease or other foreign contaminating substances before penetrant is
applied. To clean the surface we recommend the use of the Magnaflux cleaner Spotcheck SKC-S.
SKC S.
Method of Application
Penetrants can be applied by immersion dip, brush, flow on, conventional or electrostatic spray. Whichever method of
application is used, the test area must be completely covered with penetrant.
Penetration Time and Temperature
The generally accepted minimum penetration
ration time is 2 to 5 minutes, 10 minutes being adequate for most situations, although
specific process specifications may require longer. Detailed processing parameters will normally be specified in the controlling
controll
process specification (where applicable).
Zyglo water washable penetrants should be used at temperatures between 10°C and 55°C.
Product Data Sheet Zyglo ZL-2C, ZL-27A, ZL-37 page 2
Product Data Sheet
Penetrant Removal
ZL-2C, ZL-27A and ZL-37
37 require the use of a lipophilic or hydrophilic emulsifier to render them water washable. The
penetrant covered partt under test is immersed in the emulsifier (hydrophilic emulsifiers can be applied by spray) for a
predetermined length of time then washed with a water spray. When using hydrophilic emulsifier it is preferable to pre-rinse
pre
the penetrant covered test part with plain water before the emulsifier is applied. This pre-rinse
pre rinse removes the bulk of the surface
penetrant lowering the amount of penetrant entering and contaminating the emulsifier tank. The pre-rinse
pre
effluent can be
easily treated to separate the penetrant
ant and water. The water can be re-used
re
in further pre-rinsing
rinsing operations.
Component Drying
Once the surface penetrant has been removed, the component should be dried prior to developer application. This is generally
achieved by placing the component in a controlled recirculating warm air dryer at a temperature of between 50°C and 70°C,
until just dry.
Zyglo developers should then be used to maximise the sensitivity of the penetrants.
Developing
A developer is used to maximise the sensitivity and to provide a white contrasting background against which the fluorescent
indications can be readily seen. Three types of developer can be used:
Dry powder developers are free flowing lightweight powders which
which are applied to the dry component by powder storm,
dusting, electrostatic spray or by puffer.
Solvent based developers are quick drying materials which are applied by spraying. The component under test must be
dry before developer application.
Aqueous orr water based developers are applied prior to component drying, by dipping or spraying. After application
the component must be dried before inspection.
Note:: To maximise penetrant sensitivity, parts should not remain in aqueous developers for any length of time. Allow a
minimum of 10 minutes development time before inspecting the component in a darkened
darkened area under UV(A)
UV
(365 nm), where
indications, if present, will appear bright green-yellow
green
against the white developer background.
Recommended Pre-cleaner/Emulsifiers
Emulsifiers/Developers for ZL-2C, ZL-27A
27A and ZL-37
ZL
Product type
Pre-cleaner
cleaner
Emulsifier
Developer
Product name
Spotcheck SKC-S
Zyglo ZR-10C
Zyglo ZE-4B
Zyglo ZP-4B
Zyglo ZP-5B
Zyglo ZP-14A
Zyglo ZP-9F
Spotcheck SKD-S2
Type
Solvent based
Hydrophilic
Lipophilic
Dry
Aqueous
Aqueous
Solvent based
Solvent based
Post Cleaning
Post cleaning of the tested component can be carried out if required, by an appropriate technique. Developer residues can be
removed either by wiping with a cloth or by a water
water and detergent wash. Penetrant residues can be removed by vapour
degreasing or solvent soak.
Penetrant Rinse Water Disposal
Dye penetrant process rinse waters should not be discharged to local authority waterways or sewers without some form of
effluent treatment.
Magnaflux can advise on suitable equipment for this purpose, for further information please contact Magnaflux.
Product Data Sheet Zyglo ZL-2C,
ZL
ZL-27A, ZL-37 page 3
Product Data Sheet
Specification Compliance
Specification
AMS 2644
ASME B & PV Code, Sec V
ASTM E-165
ASTM E-1417
MIL-STD-271
PRATT & WHITNEY
ROLLS ROYCE RPS 702/CSS 232
ROLLS ROYCE RRP 58003 – supersedes RPS 702
SAFRAN Pr-5000/In-5000
5000
SNECMA DMC0010
ZL-2C
ZL-27A
ZL-37
Availability
Coverage
ZL-2C is available as follows:
1 litre covers approximately 20-28
28 square metres.
79.
25 litre containers, part number 056C079.
200 litre drums, part number 056C080.
ZL-27A is available as follows:
10 x 400ml aerosols, part number 008A002.
25 litre containers, part number 066C017.
200 litre drums, part number 066C016.
ZL-37 is available as follows:
25 litre containers, part number 066C020.
200 litre drums, part number 066C019.
Health and Safety
Safety Data Sheets
heets for the individual products are available on request from your Magnaflux distributor or via the
Magnaflux website (www.eu.magnaflux.com
magnaflux.com).
Read the relevant Safety Data Sheets
heets before use.
use
Magnaflux (A Division of ITW Ltd),
Faraday Road, South Dorcan Industrial Estate,
Swindon, Wiltshire, SN3 5HE, UK.
Tel: +44 (0)1793 524566
Fax: +44 (0)1793 490459
Email: [email protected]
www.eu.magnaflux.com
Issue 3 15/12/2012
Product Data Sheet Zyglo ZL-2C, ZL-27A, ZL-37 page 4