MIL-DTL-53030D
components be mixed together with a mechanical mixer. Nonconformance to 3.6.5.1 shall
constitute failure of this test.
4.5.11.2 Dilution. Reduce the admixed primer with water meeting the type IV requirements of
ASTM D1193 to a spraying viscosity as recommended by the manufacturer. The water shall be
added slowly under constant agitation to prevent foaming. It is also recommended that a
mechanical mixer be used while water is being added. Allow to stand undisturbed and covered
for at least four (4) hours to check the pot life requirement. Nonconformance to 3.6.5.2 shall
constitute failure of this test.
4.5.12 Spraying properties. Reduce the admixed coating in accordance with 4.5.11.2. Material
shall be sprayed on a solvent cleaned test panel (see 4.5.2) to a dry film thickness of 1.5 ± 0.2
mils (37.5 ± 5 microns). The coating properties of the dry sprayed surface shall be observed for
compliance with 3.6.6.
4.5.13 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 ¼ inch
mandrel. Examine the coating for cracks over the area of the bend for compliance with 3.7.1.
4.5.14 Adhesion. Spray the primer as in 4.5.12 on a steel and aluminum panel pretreated as in
4.5.2. Air dry the specimens for seven (7) days. Perform adhesion testing as specified in ASTM
D3359, method B and examine for compliance with 3.7.2.
4.5.15 Water resistance. Prepare two panels as specified in 4.5.12. Allow the panels to air dry
for 168 hours. Coat all exposed, uncoated metal surfaces with wax or other suitable coating.
Immerse the panels in distilled water at room temperature for 168 hours in accordance with
ASTM D870. Nonconformance to 3.7.3 shall constitute failure of this test.
4.5.16 Hydrocarbon fluid resistance. Prepare films of primer as specified in 4.5.12. Allow the
panels to air dry for 168 hours. Do not wax or coat the exposed metal surfaces. Immerse the
panels for 168 hours in a hydrocarbon fluid conforming to JP8 at 70 ± 5 °F (21 ± 3 °C ). Panels
shall be immersed at a minimum depth of 50 %. At the end of the test period, remove and
examine for compliance with 3.7.4. Nonconformance to 3.7.4 shall constitute failure of this test.
4.5.17 Corrosion resistance. Prepare ten (10) pretreated steel and five (5) aluminum 3 x 6 inch
panels as specified in 4.5.2.1. Allow the panels to air dry for 168 hours. Edges and uncoated
metal surfaces shall be coated with wax or other suitable coating.
4.5.17.1 Salt spray resistance. Take five (5) of the steel panels and all five (5) aluminum panels
from 4.5.17 and make an "X" scribe through the primer. Expose the panels to 5 percent salt
spray for 1,000 hours as specified in ASTM B117. Remove the panels and rinse gently in
running water no warmer than 100 oF (38 oC) until free from any visible salt deposits. Examine
immediately for compliance with 3.7.5.1. Strip the primer from the panels with a HAP-free paint
remover. Inspect the panels for rust, pitting or corrosion. Nonconformance to 3.7.5.1 shall
constitute failure of this test.
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