. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 28. Deep cracks in neoprene rubber insulation. The wire was exposed to seawater. Electrical Cable Insulation for Single Conductors and Multiconductors. The insulations of the 10-inch-long electrical cables (Figure 26) were examined under a stereoscopic microscope for signs of any biodeterioration and for any physical effects of the deep-sea environment. Biodeterioration due to borer activity was more pronounced (especially in the area of a wooden bait piece) on a set of electrical cable insulations which were expos
. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 28. Deep cracks in neoprene rubber insulation. The wire was exposed to seawater. Electrical Cable Insulation for Single Conductors and Multiconductors. The insulations of the 10-inch-long electrical cables (Figure 26) were examined under a stereoscopic microscope for signs of any biodeterioration and for any physical effects of the deep-sea environment. Biodeterioration due to borer activity was more pronounced (especially in the area of a wooden bait piece) on a set of electrical cable insulations which were exposed about foot above the sediment layer than on an identical set of insula- tions which were exposed about 3 to 4 feet above the sfediment. The insulating materials which were damaged by the borers under a wooden bait piece were Teflon (Figure 29), polyvinyl chloride, silicone rubber, bakelite, polyethylene, nylon, and fluorinated ethylene propylene. The insulating materials which were neither affected by borer activity nor by the deep-sea environment were butyl rubber, neoprene rubber, and natural rubber. In addition to damage by borer activity under the wooden bait piece, the surfaces of the silicone rubber insulations were damaged by the nibbling and biting action of some 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 (Figure 30). 35. 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
Size: 1201px × 2082px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
