. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 34. Glass microscope slides and electrical wire Insulations. Electrical Cable Insulation for Single Conductors and Muiticonductors. The insulations of the 10-inch-long electrical cables (Figure 35) were examined under a microscope for signs of any blodeterioration and for any physical effects of the deep sea environment. Blodeterioration due to borer activity was more pronounced (especially in the area of a wood bait piece) on a set of electrical cable insulations which were exposed about feet above the sedimen
. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 34. Glass microscope slides and electrical wire Insulations. Electrical Cable Insulation for Single Conductors and Muiticonductors. The insulations of the 10-inch-long electrical cables (Figure 35) were examined under a microscope for signs of any blodeterioration and for any physical effects of the deep sea environment. Blodeterioration due to borer activity was more pronounced (especially in the area of a wood bait piece) on a set of electrical cable insulations which were exposed about feet above the sediment layer than on an Identical set of insula- tions which were exposed about 3 to 4 feet above the sediment. The insulating materials which were damaged by the borers under a wood bait piece were nylon, silicone rubber, vinyl resin rubber, and fluorlnated ethylene propylene (FEP). The borers had penetrated the FEP insulation, exposing the wire conductor to the seawater environment. The insulating materials which were neither affected by borer activity nor by the deep sea environment were bakelite, natural rubber, neoprene rubber, and polyethylene. In addition to damage caused by the borers under the wood bait piece, the surface of the silicone rubber Insulations were damaged by the nibbling and biting action of some marine organisms. 42. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Muraoka, James S; Naval Civil Engineering Laboratory (Port Hueneme, Calif. ). Port Hueneme, Calif. : U. S. Naval Civil Engineering Laboratory
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