Life cycle assessment of chemical agent resistant coatings

The Department of Defense (DoD) and the U.S. Environmental Protection Agency (EPA) have established a history of cooperation on a wide variety of pollution prevention research efforts, which apply the principles of Life-Cycle Engineering and Design (LCED) to DoD operations. DoD and EPA jointly sponsored this project, with funding from EPA and DoD’s Strategic Environmental Research and Development Program (SERDP), to focus on using Life Cycle Assessment (LCA) principles for optimizing the process of painting military vehicles with chemical agent resistant coatings (CARC). The objectives were to identify environmental and energy burdens of the CARC painting life cycle, and to identify and test potential improvements on a life cycle basis.This LCA of CARC includes difficulties and lessons learned while conducting all three LCA components. The streamlined life-cycle inventory (LCI) involved quantification of environmental and energy burdens associated with the CARC life cycle. Based on the results of the LCI, a preliminary scoping of potential impacts, and a knowledge of alternative CARC painting materials and equipment, five alternatives for the application of CARC were identified. The life-cycle impact assessment (LCIA) of these applications used the equivalency method for impact characterization. The life-cycle improvement assessment (LCImA) results suggested that one application, based on combining an alternative primer and the turbine high-velocity, low-pressure (HVLP) spray painting system, should be subjected to test and evaluation. The LCIA gave this alternative the lowest environmental impact potential scores for seven of nine impact categories compared to the five other alternative systems evaluated. The preferred alternative was technically evaluated in the laboratory against the baseline CARC system using test panels painted at two Army bases. Preliminary results indicate that the preferred alternative performs equal or better than the baseline system at lower cost and with reduced environmental impact potential.