MIL-DTL-14072F
(1) Galvanically incompatible basis metals shall be plated in order to reduce
the difference in potential to that allowed by Table VI. All such platings shall be Type I
regardless of the exposure condition when assembled in equipment(s). For example,
chromium plated parts intended for assembly with aluminum in a Type II environment
shall have Type I chromium platings. Whenever possible, plating to permit dissimilar
basis metal contact shall be selected in order to provide a small cathodic part in contact
with a larger anodic piece (see paragraph 3.13.1.b).
(2) Dissimilar metal contacts not permitted by Table VI will be allowed
provided that at least one of the contacting surfaces, preferably the cathodic or more
noble metal, is finished with a complete "P" finish (includes Final Film) or those "P"
finishes which include primers per MIL-PRF-23377 (without Final Film).
(3) Dissimilar metal contacts not permitted by Table VI will be allowed
provided that both contact surfaces are finished with a basic "P" finish (step 1 through 3
per Table I).
3.15 Workmanship. Finishes shall be applied to all surfaces, as required, to form
an even, adherent, protective film. Finished surfaces shall be smooth and free from
foreign debris. They shall not exhibit burnt areas, blisters, gouge marks, peeling, flaking,
checks, pits, nodules, or other significant defects. To help prevent corrosion, finished
parts shall be dry and free from all residual traces of processing chemicals. Failure to
meet these requirements and/or evidence of any major defect(s) as specified in Table IX
shall be cause for rejection and immediate corrective action. Minor defects, as specified
in Table IX, shall also be cause for immediate corrective action. At the discretion of the
Government, minor defects may be acceptable provided that the defect(s) will not be
visible after assembly.
4. VERIFICATION
4.1 Classification of inspections. The inspections specified herein are classified
as follows:
a. Surveillance inspection (see 4.2).
b. First article inspection (see 4.3).
c. Conformance inspection (see 4.4).
4.2 Surveillance inspection. The materials and finish processes used in finishing
shall be subject to periodic inspection by the Government as specified in the contract or
purchase order (see 6.2).
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