MIL-DTL-450 Coating Compound, Bituminous Solvent Type, Black \(For Ammunition\)This specification covers an asphalt compound for coating the surfaces of ammunition cavities prior to filling with explosives. It provides for an additional composition of material suitable for use in areas with specific air pollution regulations \(see 6.1 and 6.4\).

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23

MIL-DTL-450D

e. Reserve the residue for manganese determination.

4.4.4.3 Calculation of test results. Calculate the percentage of mineral matter as follows:

Where:

A = weight of residue (g)

W = weight of sample (g).

4.4.5 Manganese.

4.4.5.1 Equipment.

a. 250-mL beaker

b. Hotplate

c. Acid-washed Celite Analytical Filtering Aids (CAFA)

d. Glass microfiber filter

e. Burette

4.4.5.2 Reagents.

a. Nitric acid

b. Distilled water

c. Lead peroxide

d. N/10 oxalic acid

4.4.5.3 Method.

a. Dissolve the ash obtained from 4.4.4 in 10 mL of concentrated nitric acid and filter if

necessary.

b. Dilute to 100 mL with distilled water and transfer a 20-mL aliquot of the solution to a

250-mL beaker. Retain the remaining 80 mL of the solution for lead determination.

c. Add 1 g of lead peroxide and boil.

d. Note if manganese is present by the development of a red coloration in the solution.