MIL-PRF-46002D
TABLE V. Metal protection test specimens.
Metal
Specification
Aluminum
ASTM B209
Steel
ASTM A1008/1008M, class 1,
bright finish
Copper
ASTM B152/152M
Magnesium
AMS 4375 or ASTM B90/90M
Cadmium
A-A-51126
4.2.3.2.2 Preparation of test specimens. Clean the five test specimens described in
4.2.3.2.1 in accordance with ASTM D1748. Polish the test specimens with a slow speed,
horizontal, metallurgical polishing wheel. Perform the final polishing with 240-grit silicon
carbide or aluminum oxide paper moistened with naphtha. Hold the specimen in a suitable
holder to avoid contact with the hands. Then clean the specimens with boiling hexane and rinse
them in boiling anhydrous methanol defined by ASTM D1152. Rinse the magnesium specimen
very briefly in the methanol. When the specimens are dry, store them in a desiccator and use
them within a 24 hour period.
4.2.3.2.3 Test procedure. Weigh each specimen and place it in a wide mouth jar
approximately 76 mm in diameter and fitted with a screw cap. Use a suitable device or
procedure to insure that the specimens do not touch each other. Cover the specimen with
300 mL of the test oil. Seal the jar and place it in an oven maintained at 54 3C for seven days.
On completion of the test, remove the compound and any corrosion products from the specimens
by swabbing with hexane, followed by methanol, using surgical gauze pads. Follow each
swabbing operation with a rinse in a clean solvent. Reweigh the specimens and calculate the
change in weight. The samples shall not exhibit weight gains or losses more than as specified in
table II (see 3.4.2).
4.2.3.3 Vapor phase copper protection.
4.2.3.3.1 Test strips. The test strips shall be copper (see ASTM D130 for description of
specimen). Three strips shall be used for each test.
4.2.3.3.2 Polishing the strips. Polish the three test strips in accordance with 4.2.2.2.2.2,
with the exceptions that the residue shall be removed with hexane rather than naphtha (see
4.2.2.2.2.2b), and that the strips will be heated in boiling hexane rather than naphtha (see
4.2.2.2.2.2c).
4.2.3.3.3 Test apparatus. Use the test apparatus specified for the vapor phase protection
test (see 4.2.2.2.2.3).
4.2.3.3.4 Cleaning of apparatus before the test. Clean the test apparatus according to the
procedure specified for the vapor phase protection test (see 4.2.2.2.2.4).
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