MIL-PRF-3150E
3.4 Interface requirements.
3.4.1 Copper strip corrosion. The oil shall not tarnish the copper strip exceeding the
value of 2a on the ASTM Copper Strip Corrosion Standards incorporated in ASTM D130
Standard Test Method for Corrosiveness to Copper From Petroleum Products by Copper
Strip Test (see 4.4.1).
3.4.2 Removability. When tested as specified in paragraph 4.4.2, the oil shall
leave no visual evidence of oil residue, stain or discoloration on test panels after testing.
3.5 Environmental requirements.
3.5.1 Humidity protection. When tested as specified in paragragh 4.5.1, the oil shall
provide protection against corrosion such that not more than three corrosion dots, of which, the
lengths, widths, or diameters shall not be greater than one millimeter shall be evident on the test
panels after 30 days (720 hours) exposure in the humidity cabinet. The total of such corrosion
dots on all three test panels shall not exceed three. Corrosion on the outer 6 mm of the panels
shall not be cause for rejection (see 4.5.1).
3.5.2 Salt-spray resistance. When tested as specified in paragragh 4.5.2, the oil, when
applied to three test panels, shall provide salt-spray resistance so that not more than three
corrosion dots, of which, the lengths, widths, or diameters are not greater than one millimeter
after 48 hours exposure to a spray of 5% salt solution or the oil fails to pass. The total of such
corrosion dots on all three test panels shall not exceed nine or the oil fails to pass. Corrosion on
the outer 6 mm of the panels shall not be cause for rejection (see 4.5.2).
3.5.3 Accelerated stability. When tested as specified in paragragh 4.5.3, the oil shall flow
freely to its new level within 5 seconds and the viscosity shall not change more than ± 5% from
the original viscosity (see 4.5.3 and TABLE IV).
3.5.4 Low temperature stability. When tested as specified in paragragh 4.5.4, the oil shall
flow freely to its new level within 5 seconds and the viscosity shall not change more than ± 5%
from the original viscosity (see 4.5.4 and TABLE V).
3.5.5 Storage stability. When tested as specified in paragragh 4.5.5, the oil shall meet all
of the requirements specified in Table II, 3.3.3, 3.4.1, 3.4.2, 3.5.1, 3.5.2, 3.5.3, and 3.5.4 after
completion of the 6-month storage stability test (see 4.5.5 and TABLE VI).
3.6 Operating requirements.
3.6.1 Physical properties. The kinematic viscosity of the oil shall be as specified
in Table II.
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