MIL-PRF-46147D
be used which sufficiently cleans surfaces to pass ASTM F22 but does not cause damage to
the surface (for example, hydrogen embrittlement).
2/ Perform this test with the following exception: Use anodized aluminum panels as prescribed
in ASTM D2510 and an oven temperature of 191 ± 3°C.
3/ Make two parallel scratches one hour after drying.
4.1.2 Conformance inspection. Conformance inspection shall consist of the following
tests:
a.
Endurance life (see 3.3.1).
b.
Film adhesion (see 3.4.1).
c.
Solids content (see 3.4.5).
Salt spray (fog) resistance (see 3.6.3).
d.
4.2 Order of inspection. Perform environmental tests first, followed by the remaining
verifications in any sequence.
4.3 Verification methods. The types of verification methods included in this section are
visual, inspection, measurement, sample tests, full-scale demonstration tests, simulation,
modeling, engineering evaluation, component properties analysis, and similarity to
previously-approved or previously-qualified designs.
4.3.1 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost-effective sampling procedures, to verify performance. See the contract for alternatives that
replace verifications required by this specification.
4.3.2 Inspection conditions.
4.3.2.1 Atmospheric conditions. Unless otherwise specified, all examinations and tests
shall be performed at a temperature of 25 ± 3.0°C (77 ± 5.4°F) and at a relative humidity of
50 ± 20%.
4.3.2.2 Preparation of aluminum test specimens. Test panels made from aluminum
alloy 2024, shall measure approximately 0.5 mm by 76 mm by 152 mm and shall be sulfuric acid
anodized. The panels shall be pre-cleaned with aliphatic naphtha or any other EPA compliant
cleaner that sufficiently cleans the surfaces to pass ASTM F22. The lubricant shall be applied to
the panels in accordance with (IAW) Appendix A in a well-ventilated area or hood where no
flame or ignition source is present. Only one side of each panel shall be fully coated, except for
two of the anodized aluminum panels which shall have the lubricant applied to a 25.4 mm wide
strip to enable measurement of the film thickness. A spray application technique shall be used to
coat the panels for the tests specified herein. Test panels shall be cured at 25 ± 2.0°C (77 ±
3.6°F) for a minimum of 24 hours. Three coats shall be the maximum number required to
obtain the specified film thickness (see 3.4.2). At least two test panel specimens shall be used in
each test method. A total of 22 aluminum panels are required for testing IAW performance
requirements.
4.3.2.3 Preparation of steel test specimens. The test panels shall measure approximately
3.2 mm by 76 mm by 152 mm. The panels shall be pre-cleaned with aliphatic naphtha or an
EPA compliant cleaner that sufficiently cleans surfaces to pass ASTM F22. The panels shall
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