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P <br /> _ P-C-111 C <br /> 4.5.8 Density. Determine the density of the compound at 32° and 77°F. <br /> using a 10 ml. calibrated volumetric flask. <br /> 4.5.9 Kinematic viscosity. Determine the kinematic viscosity of the com- <br /> pound at 77° and at 130°F. in accordance with ASTM D 445. <br /> 4.5.10 Distillation characteristics. Perform a complete distillation of <br /> the compound as specified in ASTM D 86. Addition of a silicone type anti- <br /> foaming agent is recommended. Record the initial boiling point and also the <br /> temperature at which each 10 ml. increment was distilled. Check for compli- <br /> } ance with 3.6. <br /> ` 4.5.11 Flashpoint. Determine the flashpoint as specified in ASTM D 92. <br /> 4.5.12 Pour point. Determine the pour point by ASTM D 97. <br /> 4.5.13 Emulsification. Add 90 ml. of 15 grain per gallon h4rd water to <br /> 10 mi. of compound in a 100-m1. glass-stoppered graduated cylinder. Close the <br /> cylinder and shake it for 30 seconds at a rate of 4 cycles per second. Allow <br /> the emulsion or solution to stand undisturbed for 4 hours. Without disturbing <br /> the graduated cylinder, observe for the presence of scum, curd, or a definite <br /> layer of sediment. The hard water shall be prepared by dissolving 0.156 g. <br /> of anhydrous calcium chloride and 0.236 g. of magnesium chloride, hexahydrate, <br /> in 1 liter of distilled water. <br /> 4.5.14 Phase separation on cyclic freezing. Mix type 1 or 11 compounds as <br /> in 4.5.7.1 and place 2 liters in one or more containers and stopper. Alter- <br /> nately, chill the compound and a container of the comparison formula of the <br /> same type to at least -40°F. and permit them to reach room temperature (60° <br /> to 900F.) six times without agitation. For type 1 compounds, dilute with an <br /> equal volume of distilled water after the compound reaches room temperature <br /> the sixth time and stir gently for 15 minutes. Compare the diluted compound <br /> to the diluted comparison formula for ease of dispersion of the precipitate <br /> and quantity of precipitate remaining after dilution. For type 11 compounds, <br /> p after reaching room temperature for the sixth time, examine for precipitate <br /> 1' or any phase separation. Reserve the compounds for tests specified in 4.5.15 <br /> and 4.5.16. <br /> 4.5.15 Chemical corrosion. <br /> 4.5.15.1 Preparation of test panels. Test panels 3- by 1/2- by 1/32- to <br /> 1/16-inch size of the following metals shall be used: Aluminum alloy, temper <br /> H14 or H24 conforming to QQ-A-250/2; magnesium alloy conforming to QQ-M-44; <br /> bronze conforming to QQ-B-750, composition D, hard; zinc conforming to QQ-Z- <br /> 301, type 1; brass conforming to QQ-B-613, composition 1, cold rolled, half- <br /> hard. Polish eight test panels of each metal, 4 for the comparison formula <br /> of 4.5.19.2 and 4 for the compound, by stroking each face approximately 25 <br /> times with No. 50 aluminum oxide cloth followed by 25 strokings with No. 150 <br /> aluminum oxide paper on each face. Polish edges smooth. Wash the panels with <br /> ethyl alcohol, dry with paper towelling; and weigh to the nearest 0.1 milli- <br /> gram (mg.) . Then place panels into test tubes approximately 19 by 150 mm. in <br /> V size. i <br /> V 15 <br />