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Page Title:
Aluminum alloy surface treatment |
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|  MIL-T-81838(AS)
3.2
Selection of specifications and standards - Specifications and
standards for necessary commodities and services not specified herein shall be
selected in accordance with MIL-STD-143.
3.3
Finish -
A l u m i n u m alloy surface treatment - The internal surfaces of the
3.3.1
tank shall be treated in accordance with Type I of MIL-F-7179.
3.3.1.1
E x t e r n a l finish - All external surfaces shall repainted. Paint
shall consist of MIL-P-23377 epoxy primer (0.0006 to 0.0009 inches dry film
thickness) topcoated with MIL-C-81773 aliphatic polyurethane, Color #17875 (Top-
coat dry film thickness of 0.0010 to 0.0015 inches) after MIL-C-5541 surface treat-
ment, to obtain adequate paint adhesion.
3.4
Welding - Fusion welding shall be in accordance with MIL-W-
8604. Resistance, spot and seam welding shall be in accordance with MIL-W-6858.
W e l d e r s ' certification - Welding shall be performed by personnel
3.4.1
certified in accordance with MIL-T-5021.
X - R a y inspection - X-Ray inspection shall be performed in accord-
3.4.2
ance with MIL-STD-453.
D y e penetrant inspection - A dye penetrant inspection shall be
3.4.3
performed in accordance with MIL-I-6866.
Identification of product - Each part or assembly shall be identified
3.5
in accordance with MIL-STD-130.
E x t e r i o r decalcomania - A decalcomania shall be furnished that
3.501
conforms to MIL-D-8634. The decalcomania shall be located on the tank exterior
near the filler unit and shall be legibly filled with the following information:
TANK, FUEL, AIRCRAFT, AUXILIARY EXTERNAL
Type Designation - Aero 1D
Federal Stock Number
Tank Material
Capacity (in U.S. Gallons)
Weight Empty (Excluding Tail Cone Assembly)
Manufacturer's Part No.
Manufacturer's Serial No.
4
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