The Mk 77 Mod 0 Gas Generator countermeasure launch tube used on U.S. Navy submarines was constructed from 1026 carbon steel. The launch tube O-ring seal surfaces were exposed to seawater and subject to corrosion resulting in a two year service life. A polymer composite material can replace the steel and extend the service life of the launch tube to 10 years.
We developed a lightweight, low cost, corrosion-free polymer composite material to replace the corrosion prone steel. The composite material was designed to meet launch tube requirements including hydrostatic pressure, underwater explosive shock, shipboard vibration, and ordnance testing.