MIL-P-38336A(USAF)
3.4.3 Coarse particles and skins. When tested in accordance with 4.6.1, the percentage of coarse particles and skins retained on the sieve shall not exceed by more than 0.5 percent the total amount of residue retained when the dry zinc pigment is subjected to the sieve test.
3.4.4 Primer stability. When tested in accordance with 4.6.5, after standing undistributed for eight hours, the primer shall not have aged or settled to the extent that it cannot be easily redispersed into a smooth, homogeneous mixture by hand mixing.
3.4.5 Storage stability. At the time of submission of bid, the manufacturer shall certify that after one year's storage at a temperature of 90°F +10°F the primer shall meet all the requirements of this specification.
3.5 Coating
3.5.1 Film properties. The coating shall be at least 3.5 + 0.5 mils in dry film thickness and shall be smooth, even and free of runs, sags, streaks, or other imperfections.
3.5.2 Application methods. The primer shall be applied by spraying or brushing over solvent cleaned, phosphoric acid treated, or sand blasted steel.
3.5.2.1 Dry surfaces. When tested in accordance with 4.6.6, the coating shall be applied without
"mud-cracking" or loss of adhesion.
3.5.2.2 Wet surfaces. When tested in accordance with 4.6.6, the coating shall cure on wet steel surfaces, and on surfaces located in environments of 90°F and 95 percent relative humidity.
3.5.3 Drying time
3.5.3.1 Dry surfaces. A film of the primer, prepared and tested in accordance with 4.6.7, shall dry dust free in not more than 30 minutes, and shall be dry through in not more than four hours.
3.5.3.2 Wet surfaces. A film of the primer, prepared and tested in accordance with 4.6.7, shall cure dust free in not more than one hour, and cure through in not more than six hours.
3.5.4 Flexibility. When tested in accordance with 4.6.8, a film of the primer shall show no cracking, or loss of adhesion in the bend areas.
3.5.5 Adhesion. When tested in accordance with 4.6.9, coatings of the primer shall show no lifting, flaking, or other signs of damage.
3.5.6 Fluid resistance properties
3.5.6.1 Water resistance. When tested as specified in 4.6.10.1, the primer shall show no wrinkling, blistering, loss of adhesion, or other visible defects.
3.5.6.2 Hydrocarbon resistance. When tested as specified in 4.6.10.2, a film of the primer shall show no wrinkling, blistering, loss of adhesion, or other visible defects.
3.5.6.3 Synthetic fluid resistance. When tested as specified in 4.6.10.3, a film of the primer shall show no wrinkling, blistering, loss of adhesion, or other visible defects.
3.5.7 Weathering properties
3.5.7.1 Accelerated weathering . When tested as specified in 4.6.11, the primer shall not be adversely affected by 30 days accelerated weathering.
Source: https://assist.dla.mil -- Do4wnloaded: 2014-09-30T21:22Z Check the source to verify that this is the current version before use.
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