MIL-PRF-81352C
TABLE III. Fluid immersion conditions.
Fluid
Fluid Temperature
Time of Immersion
Type I
4 hours
250 ±5 °F (121 ±3 °C)
Lubricating oil conforming to MIL-PRF-23699
Type II
4 hours
Type III
24 hours
150 ±3 °F (66 ±3 °C)
Hydraulic fluid conforming to MIL-PRF-83282
24 hours
JP-5 fuel conforming to MIL-DTL-5624
Room temperature
7 days
4.6.5 Weather resistance. Prepare three test panels in accordance with 4.5 through 4.5.2.
One test panel shall be used as the control. The other two test panels shall be exposed for
500 hours in a Xenon-arc weatherometer (Atlas Electric Devices Company or equivalent) that is
cycling between 102 minutes of light only and 18 minutes of light and water spray. After
exposure, measure the color difference (ĆE) value of the exposed panels and the control and
examine the coating for conformance to 3.8.2. The following conditions shall apply when testing
in accordance with ASTM-G155, type BH:
a. Black body temperature in cabinet: 145 ±5 °F (63 ±3 °C).
b. Relative humidity in cabinet: 50 ±5 percent.
c. Intensity (spectral irradiance) of Xenon-arc: 0.35 ±0.01 Watts/meter2 (W/m2) at a
wavelength of 340 nm.
d. Cabinet temperature: 108 ±5 °F (42 ±3 °C).
4.6.6 Heat resistance. Prepare two panels in accordance with 4.5 through 4.5.2. One test
panel shall act as the control, the other as the test specimen. Expose the test specimen for 60
minutes at 250 ±5 °F (121 ±3 °C) in accordance with ASTM-D2244. After exposure, examine
the test specimen and the unexposed control in accordance with ASTM-D2244 for conformance
to 3.8.3.
4.6.7 Water resistance. Test panels shall be prepared in accordance with 4.5 through 4.5.2,
with the exception that the applied coatings shall be air-dried for seven days at room temperature.
The test panels shall then be immersed in distilled water in accordance with ASTM-D1308 for
24 hours at room temperature. Within five minutes of removal from the water, the coatings shall
be examined for conformance to 3.8.4.
4.6.8 Toxicity. The product shall be evaluated by the Navy Environmental Health Center
(NAVENVIRHLTHCEN) using the administrative Health Hazard Assessment (HHA)
(see 6.4.1).
4.6.9 Extended storage stability. After a minimum of one year for metal containers and six
months for plastic containers from the receipt of the material at the testing facility the extended
storage stability test shall consist of all examinations and tests specified in table II except the
extended storage stability test. The daily mean ambient temperature for storage shall be
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