MIL-DTL-14067C
d. The weight of the residue shall be calculated to percent oil and grease, as follows:
Percent oil and grease =
Where:
A = weight of ether extract.
B = weight of blank.
W = weight of sample.
4.5.9 Silicon as Si. The silicon content shall be determined in accordance with the
mixed acid method of ASTM E34 (see 6.7).
4.5.10 Free metallic aluminum for Type II, Type III and Type V (eudiometer method).
The free metallic aluminum for Type II, Type III and Type V shall be determined as specified in
method 412.1 of Standard MIL-STD-1234. Except that the reaction flask shall contain 100
milliliters of 10 percent sodium hydroxide solution saturated with hydrogen. At standard
conditions a 0.33 to 0.34 grams sample shall be used and calculated as follows:
-
Percent free metallic aluminum =
Where:
T = temperature of water jacket in o C.
V = volume of gas in buret, milliliter.
P1 = barometric pressure, in millimeter of mercury.
P2 = vapor pressure of water at T, in millimeter, of mercury.
W = weight of sample, grams.
A = percent zinc.
B = percent silicon.
4.5.11 Aluminum, Test applicable to Type III, magnesium-aluminum alloy powdered
65/35 atomized.
4.5.11.1 Preparation of solutions.
4.5.11.1.1 8-Hydroxyquinoline solution. Five grams of 8-Hydroxyquinoline shall be
dissolved in 10 milliliters of glacial acetic acid. The solution shall be diluted to 100 milliliters,
with distilled water and filtered if necessary.
4.5.11.1.2 Bromphenol blue indicator. Into 20 milliliters of 95 percent ethyl alcohol
0.100 grams of bromphenol blue powder shall be dissolved and diluted to 100 milliliters with
distilled water.
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