MIL-DTL-450D
4.4.8.4 Calculation of test results. Calculate the alkalinity as weight percent sodium
/
hydroxide as follows:
.%
Where:
VA
= volume of sulfuric acid needed to titrate sample (mL)
VB
= volume of filtrate selected for titration (mL)
N
= normality of sulfuric acid
W
= weight of sample (g).
./
Calculate the acidity as weight percent sulfuric acid as follows:
.%
Where:
VA = volume of sodium hydroxide needed to titrate sample
(mL)
VB = volume of filtrate selected for titration (mL)
N = normality of sodium hydroxide
W = weight of sample (g).
4.4.9 Viscosity.
4.4.9.1 Equipment.
a. Penetrometer and penetrometer cone with plunger assembly
b. Cylindrical container
4.4.9.2 Methods.
a. Method 1 (Ford cup, Types I and II only). Conduct test in accordance with
ASTM D 1200 using a No. 4 Ford cup.
b. Method 2 (Penetration, Type III only).
(1) Determine the penetration test value of Type III coating compound using the
penetrometer and the penetrometer cone as described in ASTM D 217 with plunger assembly
(total moving weight) weighing 150 g.
(2) Take precautions in carrying out this procedure to eliminate, as far as possible, error
due to the volatilization of solvent and inclusion of air bubbles.
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