MIL-DTL-53072E
component epoxy type requires a 30 minute induction time.
3.4.6.5 Application. All surfaces to be painted shall be thoroughly cleaned as specified in 3.2. The
zinc-rich coating shall be applied directly to blasted ferrous metal for maximum performance. The
coating shall be sprayed to achieve a dry film thickness no less than 2.5 dry mils (62.5 microns) or as
recommended by the manufacturer. If not specified, the recommended DFT range is between 2.5 -
3.5 mils (62.5 - 87.5 microns). Dry times and recoat times are as specified by the manufacturer. The
pot life of the moisture cured urethane type is unlimited, if kept free from moisture contamination.
The pot life of the epoxy types is 4 - 6 hours at 70 ºF (21 ºC).
3.4.6.6 Comments. For approved zinc-rich coatings to be used on Army tactical equipment,
contact the U.S. Army Research Laboratory (ARL), ATTN: RDRL-WMM-C, Organic Coatings
Team, Building 4600, Deer Creek Loop, Aberdeen Proving Ground, MD 21005-5066.
3.4.7 MIL-PRF-32348 (Powder Coating, Camouflage, Chemical Agent Resistant Systems.
3.4.7.1 Description. This specification covers powder coatings for use on metallic substrates as an
anticorrosive primer with CARC topcoats, as well as a camouflage and non-camouflage CARC
topcoat for use as a finish coat on military combats equipment. Type I is a corrosion inhibiting
epoxy primer for ferrous and nonferrous metals. For interior application, the type II powder primer
can be used to replace the two coat system of epoxy primer and MIL-PRF-22750 topcoat. The
powder primer shall have prior approval from ARL in the specific topcoat color. The type III
powder covers camouflage CARC for use as finish coats on military equipment. The type IV
powder covers ammunition container CARC. These can be used on all tactical military equipment,
which includes ground, aviation, and related support assets. Because powder coatings do not
require solvents, these coatings shall be VOC-free and volatile organic hazardous air pollutant-free
(VOHAP-free).
3.4.7.2 Use. The type I and II powder primers are intended for use on properly cleaned (see 3.2)
and pretreated (see 3.3) ferrous and nonferrous metal surfaces. Wash primer conforming to DOD-
P-15328 or MIL-C-8514 shall not be used as a pretreatment when applying powder primers. These
powder primers are formulated lead and chromate free and are compatible with all CARC
topcoats. The type III powder coating is applied over approved type I powder primers. The type
IV powder coating is applied directly to properly cleaned and pretreated metal. Since these
products are electrostatically applied and requires baking for cure, this primer is designed
primarily for small and component parts. Parts shall be evaluated for their ability to withstand the
baking temperatures required in accordance with the manufacturers' recommendations prior to
coating.
3.4.7.3 Preparation. The manufacturer shall provide instructions for application preparation.
3.4.7.4 Reduction. Since this is a powder coating and does not use solvent, reduction does not
apply.
3.4.7.5 Application. All surfaces shall be properly cleaned and pretreated before application to
steel, aluminum or other substrates. The powder coatings are applied and cured using the powder
coat process specified by the manufacturer. This is generally an electrostatic application of the
powder material, where the part is electrically connected to an earth ground and the powder is
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