MIL-DTL-5541F
3.7 Electrical contact resistance of class 3 coatings. Electrical contact resistance testing
shall be as specified in the contract or order (see 6.4). The test method, frequency of testing, and
required resistance values shall be specified by the acquisition activity to meet the needs of a
particular application (see 6.1.2.1).
3.8 Chemical analysis of the conversion solution. Chemical analysis of the conversion
solution shall consist of concentration, pH, and temperature evaluations to determine that the
bath is within the ranges specified by the chemical manufacturer (see 6.11).
3.9 Workmanship. The chemical conversion coatings covered by this specification shall be
produced by treatments and processes that produce coated components as specified in this
specification.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are
classified as follows:
a. Process control inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 Process control inspection.
4.2.1 Process control tests and solution analysis. Test specimens shall be tested in
accordance with table I and 4.2.1.1. In addition to the tests in table I, solution analysis shall be
performed on all the processing solutions in the chemical conversion line (see 3.8) to verify that
the chemical concentrations are within ranges established for optimum performance (see 6.11
and 6.14). Process control tests are conducted to determine compliance of the chemical
conversion coatings with the requirements of this specification and are acceptable as evidence of
the properties being obtained with the equipment and procedures employed.
TABLE I. Process control tests.
Tests
Class
Number of
Test
Requirement
Test
test
specimen
paragraph
paragraph
specimens
preparation
paragraph
Corrosion
1A
5
4.2.2
3.6.1
4.4.1
resistance
3
5
4.2.2
3.6.1
4.4.1
Wet tape
1A
2
4.2.2-4.2.2.1
3.6.2
4.4.2
adhesion
3
2
4.2.2-4.2.2.1
3.6.2
4.4.2
Electrical
3
5
4.2.2
3.7
4.4.1
contact
resistance
5
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