MIL-PRF-85582E
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. Thin with water in accordance with manufacturer's instructions.
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.
If a topcoat is not used, the primer coating shall be allowed to air dry for not less than 14 days,
prior to testing. If a topcoat is required, the primer coating shall be air-dried for 2 hours and then
coated with a polyurethane coating conforming to MIL-PRF-85285 in accordance with 4.4.2.
4.4.2 Application of topcoat. When a topcoat is required by the test method, mix
polyurethane coating conforming to MIL-PRF-85285, Type I or IV, adding thinner, if required,
and allow it to stand 30 minutes prior to application. Type I primer coatings shall be coated with
untinted gloss white conforming to FED-STD-595, color number 17925 and Type II primer
coatings shall be coated with camouflage grey conforming to FED-STD-595, color number
36375. For filiform corrosion resistance testing (see 4.5.8.2), both Type I and Type II primer
10
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business