Archive image from page 41 of Deep-ocean biodeterioration of materials (1965). Deep-ocean biodeterioration of materials deepoceanbiodete06mura Year: 1965 Figure 34. Rubber tape, burlap (jute), and plastic tape wrappings over plastic rods and pipe. Electrical Cable Insulation Over Single Conductors and Multiconductors. The insulation of the 10-inch-iong electrical cable specimens was examined under a stereoscopic microscope for signs of any biodeterioration and for any physical effects of the deep ocean environment. The wood bait pieces were riddled by the borers. However, only silicone rubbe
Archive image from page 41 of Deep-ocean biodeterioration of materials (1965). Deep-ocean biodeterioration of materials deepoceanbiodete06mura Year: 1965 Figure 34. Rubber tape, burlap (jute), and plastic tape wrappings over plastic rods and pipe. Electrical Cable Insulation Over Single Conductors and Multiconductors. The insulation of the 10-inch-iong electrical cable specimens was examined under a stereoscopic microscope for signs of any biodeterioration and for any physical effects of the deep ocean environment. The wood bait pieces were riddled by the borers. However, only silicone rubber insulation and polyethylene Insulation were damaged by borer activity under the bait piece exposed near the sediment, and that damage was slight. The other insulations, such as butyl rubber, neoprene rubber, natural rubber, polyvinyl chloride, nylon, fluorinated ethylene propylene (FEP) and Teflon were unaffected by animal activity or by the deep ocean environment (Figure 35). The surfaces of silicone rubber specimens which were exposed about 1 foot and 3 feet above the sediment were damaged by the nibbling and biting action of some unknown marine organisms. As a result of this type of damage over the entire surface area (except underneath the area of cable clamps), the thickness of the Insulation was reduced considerably. The silicone rubber cement which was used to seal the ends of some of the cables was not affected. Laminated Plastics. The phenolic, epoxy, and melamine resin laminated plastic specimens were not damaged (Figure 36). The results of moisture absorption and hardness tests conducted on these materials are presented In Table 5. 36
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