Historical: Vasanth published a limited literature review on the use of vapor corrosion inhibitors (VCl) in naval vessels at NACE’s 1996 Corrosion Conference . He cited an NRL review of VCI during World War II conducted by Baker and Zisman. It found that equipment losses were appalling in the early war years, primarily due to poor packaging for overseas shipping. It stated that paper, cardboard, cloth, and other packaging materials can be impregnated with nitrite-based corrosion inhibitors and used for either shipment or storage of equipment. It should be noted that the US Department of Defense (DoD) includes VCls in a military standard for packaging materials .
Impetus to develop VCI covers: Around the turn of the century, the U.S. Navy was interested in securing covers that provided better asset protection than traditional canvas and vinyl covers. In 2000, a Phase II SBIR  for "Flexible Corrosion Preventative Coverings", (essentially the first generation of advanced protective covers with VCI technology), was awarded to Creare, Inc. . In 2008, the USAF published a report on a year-long study which compared the asset protection utilizing simple shelters, vinyl covers, and the first generation of advanced protective covers with VCI technology. This report provided validation that the first generation of advanced protective covers with \/CI resulted in an order of magnitude (10X) better asset protection than that provided by either vinyl covers or simple shelters .
U.S. Navy Approval: To put some context into the U.S. Navy's use of advance protective covers, in 2003 NAVSEA approved the first generation of advanced protective covers with VCI technology. Following this approval, NAVSEA began to outfit the fleet with an array of VCI protective covers for a large variety of equipment ranging from weapons systems to deck equipment. In 2012, a next generation advanced protective cover with VCI technology emerged that also provided a lighter, more form-fitting cover. This next generation cover, made from Transhield's ArmorDillo® with VCI technology, gained NAVSEA approval in 2013. These now have NSN's and can be found in the Navy's supply chain.
The U.S. Navy was among the first to realize the benefits of advanced protective covers with VCI technology. Since then, the development of high-tech fabrics containing blends of enhanced VCls has resulted in an array of advanced protective covers designed for specific applications, from transportation use and long-term storage to heavy-duty applications such as the harsh environment at sea. The use of these "next generation' advanced protective covers with VCl technology is not limited to the Navy. Demand has steadily increased across the other military branches. A more comprehensive review of advanced protective covers with VCI technology was presented at FMMS in 2016 .
Independent Verification: Authors from four countries have collaborated on a paper entitled Corrosion Inhibitors for Prolonged Protection of Military Equipment and Vehicles [7| in which they cite the rapid expansion of corrosion inhibitor use and show examples of cannons, weapons, and other military hardware wrapped in VCI impregnated polypropylene and fabrics.
In 2006, Defence Research and Development Canada conducted a study  into corrosion of its combat service support vehicles. The study reviewed corrosion related practices of the U.S. Army and U.S. Marine Corps, the Australian Defence Science and Technology Organisation (DSTO), and Royal Military College of Canada. The finding pertinent to this report was that new storage technologies should be considered and VCI protective covers were cited as an example.
Conclusion: VCIs have been extensively used by the DoD since World War ll. Almost 20 years ago, the U.S. Navy funded the development of advanced protective covers with VCI technology since the protection of canvas and vinyl covers was unsatisfactory. Since 2003, formfitted advanced protective covers with VCI technology have repeatedly proven themselves to be the costeffective choice in operational use.
 Vasanth, K. L., Corrosion Inhibition in Naval Vessels, Paper #233, Corrosion 96
 US Department of Defense, MIL-STD-3010B, Test Method Standard: Test Procedures for Packaging Materials, March 2008
 Contract N00024-00-C-4084, Agency Tracking Number N991-2770
 Shield Technologies Corporation summary of “Corrosion Benefits of Sheltering Aerospace Ground Equipment”, Final Report, dated May 2008
 Sharman, D. J., Milot, M., Ozol, S., The Wide-Ranging Benefits of Corrosion Inhibitors, American Society of Naval Engineers, MegaRust 2016: Naval Corrosion, June 2016
 Cheng, N, Cheng, J., Valdez, B., Schorr, M., Salinas, R., Bastidas, J. M. Corrosion Inhibitors for Prolonged Protection of Military Equipment and Vehicles, Materials Performance, January 2016, pp 54-57
 Wang. Y., Underhill, R. S, Klassen, B., Review of Corrosion Control Programs and Research Activities for Army Vehicles, Land Sustain (125) Thrust Advisory Group Scoping Study. Defence R&D Canada - Atlantic. DRDC Atlantic TM 2006-055, August 2006
About the Author
David Sharman has partnered closely with Transhield as a strategic consultant for nearly four years. Dave comes from an engineering background, with a Ph.D. in Mechanical Engineering and a bachelor’s degree in Aerospace Engineering from the University of South Wales. Dave has significant technical engagement with the US Navy, Naval Sea Systems Command Technical Warrant Holders, NAVSEA 21 Readiness and Modernization Program Managers, Ship Design Managers and Naval Surface Warfare Center Carderock in the use of cold to suppress stress corrosion cracking. Transhield has leveraged Dave’s Navy connections to interact with the Navy at the highest technical levels, and has been instrumental in Transhield, and the Navy, collaborating in cover research and development. Dave has authored and presented technical papers highlighting the benefits of employing Transhield advanced protective covers to prevent corrosion and reduce total asset ownership cost at Navy and international defense conferences.
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