Low
Temperature Cure Powder Coatings
Project Number: WP-0614
The
JG-PP
has partnered with ESTCP
to demonstrate, validate and implement a VOC/HAP-free
low temperature cure powder coating on DoD
weapon system components in a depot production environment. The goal of
ESTCP
is to demonstrate and validate promising innovative technologies, processes
and materials that target the DoD's
most urgent environmental needs. By using a coordinated effort, ESTCP
advances can lead to successful JG-PP
technology transitions providing cost effective, environmental technology
solutions for both the DoD's
internal and external military industrial base. Visit the ESTCP
website for additional information on the project's purpose, description,
and benefits.
The primary objective of this projects is to verify and validate the environmental, performance, and economic advantages of the proposed technology when compared to the baseline coatings. Powder coating technologies can reduce or eliminate risk and cost associated with the use of hazardous solvent-borne organic chromate coatings. The low temperature cure powder coating is fully curable at 250ºF and can replace other powder coatings which require temperatures between 280 ºF and 440 ºF. The coating was researched and developed under SERDP project PP-1268. The result will be a replacement of solvent-borne organic coatings (primer and topcoat) with a low temperature triglycidylisocyanurate (TGIC)-cured, super durable polyester thermoset powder coating.
It is estimated that approximately 2 million pounds of VOC and HAP emission result from wet paint and depainting operations at Air Force logistics centers. The new low temperature cure powder coating has the potential to eliminate more than 95 percent of the toxic and hazardous materials currently being used on the targeted components and equipment. Low temperature cure powder coating may be applied to substrates to meet the corrosion protection requirements without compromising the structural integrity of the component. The coating can be applied directly to the component substrate, eliminating the need for primers, which further reduces VOC/HAP emissions, as well as utilization of hexavalent chromium (a component of most primers).
To date, extensive material evaluation studies have been conducted; however, additional tests and evaluations are required in order to implement the coating. These tests and evaluation requirements have been fully identified by stakeholders and documented in a draft JTP. The draft JTP was leveraged from a previous JTP for the JG-PP project "Low/no-VOC and Non-Chromate Coating System for Support Equipment" that evaluated powder coatings on ground support equipment. A TP from the Air Force Powder Coating Integrated Working Group provided additional requirements information. FSE are planned for key performance areas of corrosion resistance, fluid resistance, adhesion, color shift, gloss retention and film thickness.
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This site last updated February 28, 2008.
Send all questions and comments to jgpp@ctc.com