MIL-DTL-53039E
3.6.4 Brushing properties. When tested as specified in 4.6.17, the coating shall brush
satisfactorily and shall dry to a smooth, uniform film, free from seeds, runs, sags, or streaks. The
dried film shall show no discernible brush marks.
3.6.5 Flexibility. A film of the coating tested as specified in 4.6.18 shall withstand bending
without cracking or flaking.
3.6.6 Recoatability. When tested as specified in 4.6.19, recoating of a dried film shall produce
no lifting, softening, or other film irregularity.
3.6.7 Adhesion. The assessment of the adhesion of the coating film shall be determined by its
ability to not peel from the substrate when tested in accordance with ASTM D3359 as specified
in 4.6.20. The resultant test rating shall be classified as scale 4B or better.
3.6.8 Elevated temperature adhesion. The assessment of the adhesion of the coating film shall
be determined by its ability to not peel from the previous coating film when tested in accordance
with ASTM D3359, as specified in 4.6.21. The resultant test rating shall be classified as scale
4B or better. After the initial 24 hour air dry, recoating of a dried film shall produce no lifting,
softening, or other film irregularity. The force dry panels shall show similar results to the
baseline air dry panel for recoating and adhesion.
3.6.9 Water resistance. When tested as specified in 4.6.22, a film of the coating shall show no
blistering or wrinkling and no more than a slight whitening or softening immediately upon
removal from the water. Film softening shall not exceed a 2 pencil hardness difference (see
ASTM D3363) from an unexposed film with identical cure history prior to water exposure.
After 2 hours air drying the portion of the panel, that was immersed, shall be almost
indistinguishable with regard to adhesion, hardness, color, and gloss from an unexposed film
with identical cure history prior to water exposure.
3.6.10 Hydrocarbon resistance. When tested as specified in 4.6.23, a film of the coating shall
show no blistering or wrinkling when examined immediately after removal from the hydrocarbon
test fluid. When examined 2 hours after removal, there shall be no excessive softening,
whitening, or dulling. Film softening shall not exceed a 2 pencil hardness difference (see ASTM
D3363) from an unexposed film with identical cure history prior to hydrocarbon exposure. After
24 hours drying the portion of the panel which was immersed shall be almost indistinguishable
with regard to hardness, adhesion, and general appearance from a panel prepared at the same
time but not immersed and shall have no more than a 0.5 gloss unit increase over the original 60
and 85 degree gloss values.
3.6.11 Acid resistance. When tested as specified in 4.6.24, a film of Green 383, 34094, Green
808, 34102, Dark Green 34082, Woodland Desert Sage, 34201 and IRR Foliage Green 504,
34106 shall have no blistering and show no change from the original color.
3.6.12 Accelerated weathering. Samples of aircraft colors and Olive Drab, 34088 tested as
specified in 4.6.25 for 800 hours shall show no cracking, chalking, or loss of adhesion, and shall
meet the color, infrared reflectance, 60 and 85 degree gloss requirements of the specification.
Camouflage colors tested as specified in 4.6.24 for 800 hours shall show no cracking, chalking, loss
of adhesion, or increase in the 60 and 85 degree glosses to exceed maximum values in table VII.
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