MIL-PRF-23377K
4.3.1 Primer coating test samples. Samples for tests shall consist of one complete unopened
kit selected at random from each batch (see 6.6). Containers shall only be opened when being
tested.
4.3.2 Visual inspection of filled containers. Samples shall be selected at random from each
lot (see 6.6) in accordance with ASQ-Z1.4, inspection level S-2. The lot size for this inspection
shall be the number of kits fully prepared for delivery. The selected samples shall be examined
for container fill, and completion of item identification (see 3.10), warning statements (see
3.10.1), and the precaution sheet (see 3.11). There shall be no defects (see 6.5).
4.4 Test panels. Test panels shall be prepared under laboratory conditions (see 4.5). Test
panels shall be constructed of aluminum alloy. Alloy composition and pretreatments of test
panels shall be in accordance with table I. Unless otherwise specified in the test method, the
primer coatings shall be applied in accordance with 4.4.1 and the topcoat, when required, shall
be applied in accordance with 4.4.2.
TABLE I. Aluminum test panels.
Panel
Substrate
Pretreatment
A
SAE AMS-QQ-A-250/4 (T3 temper)
MIL-DTL-5541, class 1A (conversion
coating)
B
SAE AMS-QQ-A-250/4 (0 temper)
MIL-A-8625, type I or IC (anodize)
C
SAE AMS-QQ-A-250/5 (T3 temper)
Deoxidized 1/
D
SAE AMS-QQ-A-250/5 (T3 temper)
MIL-DTL-5541, class 1A (conversion
coating)
1/ Immerse test panel for 2 minutes in corrosion removing compound conforming to
SAE AMS1640, then remove test panel and rinse with distilled water. Apply the primer
coating within one hour.
4.4.1 Application of primer coatings. When required by the test method, the primer
coatings shall be prepared and applied as follows:
a. Thoroughly mix each component separately.
b. Slowly pour component B into component A while stirring the mixture to achieve the
manufacturer's specified volume mixing ratio.
c. Dilute the admixed primer coating with component C (if applicable). If necessary,
dilute the admixed coating with thinner conforming to
MIL-T-81772, type II (see 6.11).
d. Allow admixed coating to stand undisturbed for 30 minutes prior to use, unless the
manufacturer's directions state otherwise.
e. Spray apply one cross-coat of primer coating to a dry-film thickness of 15 to 23 µ m
(0.6 to 0.9 mil) in accordance with ASTM D823 Method D.
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