MIL-DTL-53039E
a. Steel, cold rolled, pretreated with zinc phosphate coating B-952 with P60 chrome rinse, 0.032
inches (0.8128 mm) thick, for all tests except flexibility.
b. For aviation system application, aluminum test panels shall be aluminum alloy 2024-T3
treated with MIL-DTL-5541, type II (see 4.6.1.3).
c. Steel, tinplated, 0.010 inches (0.254 mm) thick, for flexibility only.
4.6.1.3 Epoxy primer. Test panels shall be solvent wiped and cleaned prior to applying epoxy
primer. Apply epoxy primer conforming to MIL-DTL-53022 or MIL-DTL-53030 to a dry film
thickness of 1.5 ± 0.2 mils (37.5 ± 5 microns). For aviation system application evaluation, MIL-
PRF-23377 or MIL-PRF-85582 epoxy primers shall be used and applied to a dry film thickness
of 0.6 - 0.9 mils (15 - 22.5 microns).
4.6.2 Color and reflectance. Prepare two sprayed samples of the coating on a black and white
hiding chart to a dry film thickness of 2 ± 0.2 mils (50 ± 5 microns). Dry for a minimum of 48
hours according to the test conditions in 4.6.1. Determine the color and infrared reflectance from
the spectral curves using the recording spectrophotometer method in accordance with ASTM
E308 and ASTM E1331. Measurements shall be made over the black portion of the hiding chart
(see 4.6.13). For aircraft colors and Dark Sandstone, 33510, compare the color as specified in
3.3 and 3.3.1. Visually match the other colors listed in 1.2.2 to the appropriate color chip from
FED-STD-595 for compliance with 3.3 and table I. Spectral reflectance limits are outlined in
tables III, IV and V. Noncompliance to 3.3 and 3.3.1 shall constitute failure of this test.
4.6.3 Total and vehicle solids. Determine the total solids (nonvolatile matter) of the coating in
accordance with ASTM D7232. Check for compliance with table VIII.
TABLE X. Index.
Requirement
ASTM
Test
Paragraph or
Item
Method
Paragraph
Table
Color and reflectance
E308 and
4.6.2
3.3 and 3.3.1
E1331
Total and vehicle solids
D7232
4.6.3
Table VIII
Pigment analysis
D2371
4.6.4
3.4.1, Table VI
and VIII
Titanium dioxide
D476, type III
-
3.4.1
or IV
Hexavalent chromium
-
4.6.5
Table VII
Lead content
D3335
4.6.6
Table VII
Cadmium content
D3335
-
Table VII
Nonvolatile vehicle
-
4.6.7
3.4.2
VOC content
D3960
4.6.8
3.4.3
VOHAP content 1/
D3271
4.6.8.1
3.4.4
17
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