MIL-DTL-53072E
3.4.3.2 Use. The primer is intended for use on pretreated ferrous and nonferrous substrates and
is compatible with CARC topcoats. The MIL-DTL-53030 epoxy primer shall not be applied
directly to wash primer containing phosphoric acid, such as those conforming to DOD-P-15328
or MIL-C-8514. Other pretreatments, as referenced in 3.3, are acceptable.
3.4.3.3 Preparation. Thoroughly agitate and mix component A until uniform. If necessary, use a
paint shaker to disperse any settled pigment in component A. Mix one volume of component B
with four volumes of component A for a type II coating until a smooth homogeneous mixture is
achieved. The preferred temperature range of each component shall be 60 to 90 oF (16 to 32 ºC)
before mixing. Component B shall be added to component A under constant agitation.
3.4.3.4 Reduction. Reduce the admixed primer with deionized water conforming to ASTM
D1193 type IV, or according to manufacturers' recommendations. Water shall be added under
constant agitation. The thinned primer shall be strained through a 60 mesh minimum paint filter
or equivalent and allowed to stand for 30 minutes prior to use or according to manufacturers'
recommendations. Mechanical mixing shortens the induction time. Consult with the
manufacturer for these times.
3.4.3.5 Application. All surfaces to be painted shall be thoroughly cleaned as specified in 3.2 and
properly pretreated as specified in 3.3. To ensure a chemically clean surface, perform the test in
4.2.3.1.1. Failure to comply with 4.2.3.1.1 is sufficient cause to do additional cleaning. After
completion of the 30 minute induction period, the primer shall be sprayed to achieve a DFT of 1.5
± 0.2 mils (37.5 ± 5 microns). The primer needs only be dry to touch (ASTM D5895) before
applying the topcoat. This is usually between 30 to 60 minutes depending on conditions. The
admixed primer shall be used within 6 hours to ensure performance. The largest factor affecting
cure is temperature. At 70 oF (21 ºC), the dry to touch time is 30 to 60 minutes and the dry to
handle time about 2 hours. Due to the fact that the primer is a water based system, a high relative
humidity retards the dry time while a low relative humidity accelerates the process. Temperature
increase shortens potlife.
3.4.3.6 Comments. The primer furnished under this specification shall be a product authorized
by the qualifying activity for listing on the QPD (see 6.4). Since the sprayed primer contains
water, care shall be taken to ensure that the primer surface is dry to touch before application of
MIL-DTL-53039. Premature topcoating leads to compromised CARC properties.
3.4.4 MIL-DTL-53084 (Primer, Cathodic Electrodeposition, Chemical Agent Resistant).
3.4.4.1 Description. This primer is a waterborne, cathodic epoxy electrodeposition primer
formulated lead and hexavalent chrome free. It meets solvent emission maximums of 144 g/l
(1.2 lbs/gal) VOC.
3.4.4.2 Use. This primer is intended for use on properly cleaned and pretreated ferrous and
nonferrous metal surfaces and is compatible with CARC topcoats. Since it is applied with an
immersion-type procedure and cured by baking, this primer is designed for a large-scale
production process.
3.4.4.3 Preparation. The manufacturer shall provide instructions for mixing and thinning.
Prepare the primer bath by mixing resin feed and pigment paste components, or single-
13
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business