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GUIDE to
METHOD “A” (water washable) PROCESSING per ASTM
E-1417-05
PRE-CLEAN
SURFACE
Part must be
clean, dry and at a temperature of 4.4° -52°C (40° - 125°F) before penetrant is applied.
Use
Cee-Bee®
# 210
or
300LF
aqueous
alkaline degreaser; immersion or spray application.
Use
Pen-Chek®
E-59A,
R-503 or R-504 solvent cleaners for spot inspection cleaning
applications.
APPLY
Pen-Chek®
TYPE I
or
TYPE II
PENETRANTS
(Method A)
Use spray,
immersion, or wipe on application.
DWELL
Wait a minimum
of 10 minutes; 20 minutes if temperature is 4.4°-10°C (40-50°F).
Reapply
penetrant if dwell is over 2 hours to prevent drying out prior to removal.
WASH
Water
temperature 10°-38°C (50°-100 °F). Water pressure < 275kPa (< 40 psi); if a
hydro-air nozzle use limit
pressure to
< 172kPa (<25 psi). Distance >30cm (>12 inches).
Time- only
long enough to remove surface fluorescence under UV-A or color under bright visible light.
DRY or
APPLY
AQUEOUS DEVELOPER (form c)
Temperature <71 °C (<160 °F)
Immersion, flow on, or spray.
Time- only
long enough to dry surface
Pen-Chek
D-78B
APPLY NONAQUEOUS (forms
“d” or “e”) or
DRY
DRY
DEVELOPER (form “a” Type I
only)
Temperature
<71 °C (<160 °F)
Pen-Chek® D-70
or
D-72A (Type I
only)
Time- only long enough to dry surface
DWELL
Wait a minimum
of 10 minutes before inspection. Maximum time is 1 hour for forms “d & e” (nonaqueous),
maximum 2
hours for form “c” (aqueous), and maximum 4 hours for form “a” (dry powder).
If times are
exceeded, clean part and reprocess.
INSPECT
For
fluorescent Type I
penetrants use
UV-A illumination of >1000 μw/cm2 @ 15inches (38.1 cm) in a
darkened area
of <21 lux visible light (<2 foot candles).
For visible
Type II
penetrants use
lighting of 1100 lux/m2 (100 footcandles) minimum.
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