Accession Number : AD0771373

Title :   Hydrostatic Testing of Syntactic Foam in Mineral Oil.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Barnes,H. E.

Report Date : 13 NOV 1973

Pagination or Media Count : 33

Abstract : For four years, syntactic foam samples were tested in water and mineral oil at pressures of 5000, 7500, and 10,000 psi at room temperature. The samples were solid cylinders 1-3/4 in. in diameter and 6 in. long. The long-term hydrostatic test results indicate a more rapid absorption of water than of mineral oil. The buoyancy half-life (flotation reduced 50%) of the syntactic foam tested is expected to be at least 10 yr, and may be as much as 25 yr, depending on the hydrostatic pressure, material density, and test medium. This indication of useful life expectancy is based on data obtained from the exposure of 20 samples having formulation densities in the 37- to 42-lb/cubic feet range.

Descriptors :   *Syntactic foams, *Buoyancy, Sea water, Mineral oils, Hydrostatic pressure, Tables(Data), Deep water, Oceans, Submersibles, Absorption, Density

Subject Categories : Plastics
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE