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MIL-T-85075A(AS)
resistant characteristics or shall be suitably protected by the use of
coatings equivalent to those listed in Table I to resist corrosion which may
result from such conditions as dissimilar metal combinations, moisture, and
salt spray as applicable. Where not indicated, class or type is at the option
of the manufacturer, subject to approval by the procuring activity.
Dissimilar metals are defined in MIL-STD-889. Unless otherwise specified
herein, physical properties of all metals shall meet the minimum requirements
of MIL-HDBK-5.
3.3.1.1 Copper and aluminum alloys. All copper alloys except for bearing
surfaces shall be suitably protected with a coating selected from Table I,
except that cadmium and zinc plating shall not be used in applications subject
to abrasion. Other metallic coatings, which shall have been demonstrated to
be satisfactory to the Government, such as electrodeposited 85 percent tin and
15 percent cadmium alloy, may be used. All aluminum alloys shall be anodized
in accordance with MIL-A-8625, type II coating, except that in the absence of
abrasive conditions the anodize may be type I coating, where applicable, or
may be a chemical film in accordance with MIL-C-5541.
TABLE I.
Metal Coatings.
Specification
Coating
QQ-P-416, type II, class 2
Cadmium plating
ASTM-B633-78, type II, SC3
Zinc plating
Chromium plating
QQ-C-320
QQ-N-290
Nickel plating
QQ-S-365
Silver plating
Tin plating
MIL-T-10727, type I
MIL-C-26074
Electroless nickel
3.3.2 Plastic parts. The use of plastic parts shall be subject to the
approval of the procuring activity for the specific application involved.
3.3.3 Selection of materials, parts and processes. Specifications and
standards for all materials, parts, and Government certification and approval
of processes and equipment, which are not specifically designated herein and
which are necessary for the execution of this specification, shall be selected
in accordance with MIL-STD- 43, except as provided in the following paragraph.
Standard part (MS, AN or Specification sheet)
3.3.3.1 Standard parts
shall be used wherever they are suitable for the purpose, and shall be
identified on the drawing by their (MS, AN or Specification sheet) part
numbers. Commercial utility parts, such as screws, bolts, nuts, and cotter
pins may be used, provided they possess suitable properties and are replace-
able by the standard parts (MS, AN or Specification Sheet) without alteration,
and provided the corresponding standard part numbers are referenced in the
parts list and, if practicable, on the contractor's drawings.
In the event
there is no suitable corresponding standard part in effect on date of
invitation of bids, commercial parts may be used provided they conform to all
requirements of this specification and the detail specification.
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