(c)
Apply one of these penetrants with a brush, cloth, or cotton swab. 1) Penetrant (Normal) (P05-208), (P05-234) 2) Penetrant (High) (P05-032), (P05-236) 3) Penetrant (Ultra-High) (P05-235) 4) Use a penetrant with the sensitivity (normal, high or ultra
high) given in the source procedure.
(d)
Drain the penetrant for 10 to 60 minutes maximum.
(e)
Use a cloth or paper towel to remove the penetrant from the surface. 1) If it is necessary, make the cloth or towel moist with one
of these materials.
a) Solvent (P11-005)
b) Alcohol (P11-014)
c) Acetone (P11-032)
d) Solvent (P11-038)
e) Solvent (P11-039)
(f)
Do a check with ultraviolet light to make sure that no penetrant stays on the surface.
(g)
Very lightly apply one of these developers on the part. 1) Developer (P05-034) 2) Developer (P05-237)
(h)
Permit a minimum of 10 minutes for development.
1) If you use a nonaqueous developer, apply it in a layer (one pass only) with a constant thickness. a) The layer must be visible, but not sufficiently thick
that you cannot see the color of the part.
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CAUTION:_______ DO THIS INSPECTION IN A DARK AREA WITH THE WHITE LIGHT NO
MORE THAN 2 FOOTCANDLES AT THE INSPECTION SURFACE. TO
MAKE THE AREA DARK, YOU CAN COVER IT WITH A BLACK SHEET.
TOO MUCH WHITE LIGHT WILL PREVENT A GOOD INSPECTION.
(i)
Examine the part with ultraviolet light.
(j)
If a surface has a moderately fluorescent background, or if you are not sure of a surface, do the procedure that follows: 1) Make a soft brush moist with one of these materials.
a) Solvent (P11-005) b) Alcohol (P11-014) c) Acetone (P11-032) d) Solvent (P11-038) e) Solvent (P11-039)
2) Lightly apply the material to the inspection surface.
a) The material must not run over or flood a surface. 3) After the material evaporates, apply the developer. 4) Examine the surface with ultraviolet light.
a) If you see an indication immediately, evaluate it immediately. b) If you do not see an indication, wait 5 minutes minimum for the development, then examine it. c) Use this evaluation procedure only one time for an indication.
(k) Use a cloth or paper towel to remove the developer from the surface. 1) If it is necessary, make the cloth or towel moist with one
of these materials. a) Solvent (P11-005) b) Alcohol (P11-014) c) Acetone (P11-032) d) Solvent (P11-038) e) Solvent (P11-039)
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EPOXY PRIMER/ALUMINIZED EPOXY ENAMEL (SPOP 148) - MAINTENANCE PRACTICES
________________________________________________________________________
1. General_______
A. This task gives the steps to apply an epoxy primer and an aluminized
epoxy enamel.
TASK 70-42-01-372-001-N00
2. Aluminized Epoxy Enamel Application___________________________________
A. Standard Tools and Equipment
(1)
Air Source - Compressed, Dry Filtered
(2)
Container - (two required) of suitable volume for area of application, for mixing epoxy primer and aluminized epoxy enamel
(3)
Gun - Heat, 180°F (82°C) maximum heat output
(4)
Gun - Standard Paint Air Spray
B. Consumable Materials
(1)
G00834 Cloth - Cotton, Lint-free
(2)
C00666 Enamel - Aluminized Epoxy, (PWA 569) (P05-037) (includes Enamel Base and Curing Solution 910-465)
(3)
C00655 Primer - Epoxy, (PWA 568) (P05-036) (includes Primer Base, Curing Solution 910-357, and Solvent 020 X 324)
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