Powder Coating as an Environmentally Acceptable Alternate to the System of MIL-P-53022 and MIL-PRF-22750

Report No. ARL-TR-2965
Authors: Jeffrey L. Duncan
Date/Pages: May 2003; 16 pages
Abstract: Powder coatings offer potential performance and environmental benefits over conventional, solvent-based protective coatings. At the request of the Albany Marine Corps Logistics Base (MCLB), three powder coatings were evaluated as performance based alternatives to the military specification coatings normally used on combat vehicles. Specimen panels, to which the powder coatings had been applied, were subjected to a selection of performance tests from MIL-P-53022, an epoxy primer specification, and from MIL-PRF-22750, an epoxy topcoat specification. These products are part of the U.S. Army?s Chemical Agent Resistant Coating (CARC) system and are applied to all Army and Marine Corps tactical equipment. These substrates, 1020 steel with zinc phosphate pretreatment, bare aluminum, and aluminum with chromate conversion coating, were submitted, representing the materials from which vehicles are constructed. Coupled with the three powder coatings, that led to nine possible combinations of substrate and powder coating. With the exception of one minor problem, probably associated with substrate pretreatment rather than coating performance, all three powder coatings performed well, and the U.S. Army Research Laboratory believes they are acceptable for use at Albany MCLB as alternatives to the CARC specifications normally used.
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 2003