gal\)\) as applied. The primer is also formulated free of hazardous air pollutants \(HAP-free\). This primer is not to be used on tactical or combat equipment. Equipment primed with this material is not to be coated with chemical agent resistant coating \(CARC\) primers or topcoats.

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MIL-DTL-11414F

contents for 20 seconds. Reexamine the material for any evidence of non-homogeneity or

undispersed pigment. Nonconformance to 3.6.4 shall constitute failure of this test.

4.5.18 Spraying properties. If reduction is necessary for spray application, reduce the enamel as

specified in 4.5.11. Spray the coating on a solvent cleaned test panel (see 4.5.3) to a dry film

thickness of 1.5 � 0.2 mils (37.5 � 5 microns). Observe the spraying properties for compliance

with 3.6.5.

4.5.19 Flexibility. Determine flexibility in accordance with ASTM D522, method B. Spray the

coating on a steel panel, tinplated 0.010 inches (0.254 mm) thick to a dry film thickness of 1.5 �

0.2 mils (37.5 � 5 microns). Air dry for 168 hours. Bend the coated panels over a � inch mandrel.

Examine the coating for cracks over the area of the bend for compliance with 3.6.6.

4.5.20 Knife test. Using the flat portion of the panel used for the flexibility test (see 4.5.19), perform

this test in accordance with ASTM D6677 and check for compliance with 3.6.7.

4.5.21 Water resistance. Spray the coating on a test panel (see 4.5.3) to a dry film thickness of

1.5 � 0.2 mils (37.5 � 5 microns) and air dry for 168 hours. Coat all exposed unpainted metal

surfaces with wax or suitable protective coating and immerse in deionized water at 25 � 1 �C (77

� 2 �F) for 18 hours. Panels shall be immersed at a minimum depth of 50%. At the end of the test

period, remove and examine for compliance with 3.6.8.

4.5.22 Hydrocarbon resistance. Spray the coating on a test panel (see 4.5.3) to a dry film thickness

of 1.5 � 0.2 mils (37.5 � 5 microns) and air dry for 168 hours. Immerse halfway in a hydrocarbon

fluid conforming to JP8 at 70 � 5 �F (21 � 3 �C) for 4 hours. Evaluate for compliance with 3.6.9.

4.5.23 Adhesion. Spray the coating as in 4.5.18 on a steel panel pretreated as in 4.5.3. Air dry the

specimen for seven (7) days. Perform adhesion testing as specified in ASTM D3359, method B

and examine for compliance with 3.6.10.

4.5.24 Salt spray resistance. Prepare three 4 x 12 inch steel panels as specified in 4.5.3. Reduce

the enamel as specified in 4.5.11 and spray the panels to a dry film thickness of 1.5 � 0.2 mils

(37.5 � 5 microns) and air dry for 7 days. Coat edges and uncoated metal surfaces with wax or

other suitable coating, but do not score. The enamel-coated panels shall be exposed to a 5 percent

salt spray fog test in accordance with ASTM B117. Panels shall be exposed for 48 hours. Upon

completion of the test, panels shall be removed and washed gently in running water, no warmer

than 100 �F (38 �C), until surface is free from any visible salt deposits and then immediately

examined for compliance with 3.6.11. Strip the enamel from the panels and inspect the panels for

rust, pitting or corrosion. Nonconformance to 3.6.11 shall constitute failure of this test.

4.5.25 Weather resistance. Prepare two panels as specified in 4.5.24. Allow to air dry for a

minimum of 7 days. Panels shall be placed outdoors for 24 months. The exposure racks shall be

weathered at latitude 33� 23' north and 112� 35' west. At the end of the exposure, strip the

enamel film from the surface of the metal and examine it for conformance with 3.6.12.

Nonconformance to 3.6.12 shall constitute failure of this test.