MIL-PRF-24712A

Abstract

This specification covers powder coatings for interior steel, aluminum, copper-nickel and bronze equipment, furniture, and electrical box surfaces and on exterior steel, aluminum, copper-nickel, and bronze surfaces exposed to marine atmosphere, high humidity, seawater, and weathering. <br>Powder coatings covered by this specification are of the following types and classes as specified (see <a>6.2</a>). <br>The types of powder coatings are designated as follows: </span><pre> Type I - Epoxy Type II - Epoxy polyester hybrid Type III - Polyester Type IV - Polyester triglycedial isocyanurate (TGIC) Type V - Polyester urethane hybrid Type VI - Acrylic Type VII - Acrylic polyester hybrid Type VIII - Acrylic urethane hybrid Type XI - Urethane Type X - Polyurethane Type XI - Vinyl Type XII - Nylon</pre> <br> <strong>Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA 03R42, Naval Sea Systems Command, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</strong> <br>The classes of powder coatings are as follows: <pre> Class 1 - Interior, dry service Class 2 - Interior, wet spaces, immersion service Class 3 - Exterior</pre> <br> <br><b><u>Intended Use:</u></b> This specification is for powder intended for use as a high-grade, durable coating to protect interior and exterior steel, copper-nickel, and bronze components. Interior dry service equipment, furniture, and electric box surfaces are subject to severe wear such as impact and abrasion. Interior immersion service components are exposed to corrosive environments, but not ultra-violet light. Exterior items receive severe exposure to adverse weather, condensing moisture, corrosive atmospheres, and marine environments. Coating application and touchup should be as specified in <a>6.1.1.1</a> and <a>6.1.1.2</a>. Powder coatings in accordance with this specification should be applied as specified in the manufacturer's instructions or technical data sheet. Coatings should be maintained by using a compatible patch compound. Electrostatic spray application is the most common form of powder application. <br>