MIL-PRF-3420H
4.5 Verification of performance requirements.
4.5.1 Test methods. Unless otherwise specified, the tests in table VI shall be conducted in
accordance with the identified methods.
TABLE VI. Test methods.
ASTM
Special
MIL-STD-3010
Test
Tests
Requirement or
Test
Method No.
Method No.
Exception Note
Vapor inhibitor ability
4031
--
procedure B
1/
Vapor inhibitor ability (after
4031
--
1/
procedure B
exhaustion)
Blocking resistance
3003
--
2/
Contact corrosivity
3005
--
Bursting strength
D774
Water resistance of marking
3027
--
Tearing strength
--
D689
1/ The following apply to the VIA and VIA after exhaustion tests:
a. The apparatus used for these procedures shall be cleaned in a solution of hot water and
detergent, followed by thorough rinsing in hot tap water.
b. Four specimens shall be tested.
c. After immersion cleaning in methanol, each specimen be allowed to dry for 30 seconds in
a draft free area, with the test surface in a vertical position.
d. Immediately after insertion into the VIA test apparatus, each specimen shall be blown free
of dust using a short burst from a self pressurized can of 1,1,1,2 tetrafluoroethane.
e. After eliminating the plug with the most corrosion spots, the remaining three plugs shall
meet the requirement in table I.
2/ (Style C materials shall be tested in a face-to-back configuration only.) Samples shall be
tested at both room temperature and 160 °F.
4.5.2 Long term protection test.
4.5.2.1 Preparation of panels. Four 2 by 4 by 1/8 inch, cold rolled SAE1010 steel panels,
with rounded edges shall be finished and cleaned as specified in the contact corrosivity test (see
4.5.1). Two 1/8 inch diameter holes shall be drilled at opposite corners of a 4 inch side.
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