MIL-DTL-5541F
specification. Unless otherwise specified, parts that have been painted or incorporated into an
assembly shall not be considered retrievable.
4.3 Conformance inspection.
4.3.1 Sampling. Samples for visual examinations shall be selected from each lot (see 4.3.2)
of treated articles, items, parts, or components. Unless otherwise specified in the contract or
order (see 6.4 and 6.18), the sampling plan and acceptance criteria shall be as specified in ASQ-
Z1.4, inspection level II.
4.3.2 Visual lot examination. Samples selected in accordance with 4.3.1 shall be visually
inspected for compliance with 3.5 and 3.9. Each lot shall be inspected to ensure that the lot
consists of all conversion coated items of the same type, class, form, and method, treated under
the same process conditions, and submitted for acceptance at one time. Unless otherwise
specified on the contract or order, the lot size shall not exceed the number of parts, articles,
items, or components resulting from one day's production (see 6.4).
4.3.3 Failure. Failure to conform to 4.3.2 shall result in rejection of the represented lot.
4.4. Test methods.
4.4.1 Corrosion resistance test. Five test specimens prepared in accordance with 4.2.2 shall
be used for corrosion resistance testing. After the coating application, the test specimens shall be
dried at 60 to 100 ºF (16 to 38 ºC) for 24 hours (see 6.14). The test specimens shall then be
subjected to a 5 percent salt spray test in accordance with ASTM-B117 for 168 hours, except
that the significant surface shall be inclined 6 ± 2 degrees from the vertical. After exposure, test
pieces shall be cleaned in running water not warmer than 100 ºF (38 ºC), blown with clean, dry
unheated air, and visually examined for conformance to 3.6.1. The dry unheated air for type I
shall be not warmer than 100 ºF (38 ºC) and for type II shall follow the manufacturer's
recommended temperature ranges.
4.4.2 Wet tape adhesion test. Two test specimens prepared in accordance with 4.2.2 and
4.2.2.1 shall be tested for wet tape adhesion. The test shall be conducted in accordance with
FED-STD-141, method 6301, to determine conformance to 3.6.2.
5. PACKAGING
5.1 Not applicable.
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