MIL-PRF-4556F
to make additional tests deemed necessary to determine that the coating meets the
requirments of this specification.
TABLE II.
Index.
Test
Requirement
FED-STD-141
Test
Paragraph
Paragraph
ASTM Method
Method
Color
4.3.4
3.3
D1729
-
Pigment content
-
3.5.1
D2371
-
Pigment analysis
-
3.4.1
D2371
-
Lead content
4.3.5
3.4.1.1
D3335
-
Chromium content
4.3.6
3.4.1.1
-
-
Volatile organic
-
3.4.4
D3960
-
content
Viscosity
4.3.7
3.5.1
D562
-
Flash point
4.3.8
3.5.1
D3278
-
Drying time
4.3.9
3.5.1
D1640
-
Condition in
4.3.10
3.6.1
-
-
container
Storage
4.3.11
3.6.2
-
3011, 4261
stability
Mixing
4.3.12
3.6.3
-
3011, 4261
properties
Spraying
4.3.13
3.6.4
-
4331
properties
Brushing
4.3.14
3.6.5
-
4321
properties
Knife test
4.3.15
3.6.6
-
6304
Pot life
4.3.16
3.6.7
-
-
Fuel and water
4.3.17
3.6.8
-
-
resistance
Adhesion
4.3.18
3.6.9
-
-
Impact resistance
4.3.19
3.6.10
D2794
-
Solvents
4.3.20
3.4.3
-
-
4.3.3 Test panels. Except as otherwise specified, test panels shall be cold
rolled steel, SAE 1010 low carbon, 3 by 6 inches, 0.032 inch thick.1 They shall
be abrasive blasted with fresh sand to a smooth uniform appearance in compliance
with SSPC-SP5. Sand blast only the side that has been abrasive ground by the
manufacturer. Sand blast prior to testing only and store in a desiccator.
4.3.4 Color. Mix the components of the primer and the topcoat as specified in 4.3.7
and determine the color in accordance with ASTM D1729 by applying the coatings on
black and white hiding charts2 to full hiding. Allow to air dry for 24 hours and
evaluate for compliance with 3.3.
4.3.5 Lead content. Determine the percent of lead in the primer and the topcoat
by any of the following methods. Mix as specified in 4.3.7 and evaluate for
compliance with 3.4.1.1.
4.3.5.1 Determination of lead by atomic absorption spectroscopy. Determine
percent of lead on the mixed samples in accordance with ASTM D3335.
1
Q Panel Company, Cleveland, OH, S-36 or equivalent.
2
Leneta Company, Ho-Ho-Kus, NJ, Form 2A or equivalent.
7
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