. Durability of plastics in anaerobic marine sediments. Plastics; Marine sediments; Materials. Figure 4. Specimen of wood exposed for 1 year at mud line. Harbor Exposure Tests Two of the test racks with specimens all mounted as in Figure 2 were placed in the black and anaerobic bottom sediments of the Port Hueneme harbor. One of the racks was recovered after 1 year, and the specimens were examined to obtain data for a preliminary report on the durability of plastics in anaerobic sediments [4]. The other rack was exposed partially buried in the anaerobic bottom sediments for 2-1/2 years (Figure
. Durability of plastics in anaerobic marine sediments. Plastics; Marine sediments; Materials. Figure 4. Specimen of wood exposed for 1 year at mud line. Harbor Exposure Tests Two of the test racks with specimens all mounted as in Figure 2 were placed in the black and anaerobic bottom sediments of the Port Hueneme harbor. One of the racks was recovered after 1 year, and the specimens were examined to obtain data for a preliminary report on the durability of plastics in anaerobic sediments [4]. The other rack was exposed partially buried in the anaerobic bottom sediments for 2-1/2 years (Figure 3). The third of the replicate test racks on which the specimens of polymeric materials were mounted was suspended for 2-1/2 years from the materials-testing dock at Port Hueneme. This rack was exposed at a depth of 3 feet below the low tide line. (Figure 5 shows the fouling organisms attached to the rack after this period.) The fourth and final replicate test rack was stored in the labora- tory for a period of 2-1/2 years, and the specimens were maintained as 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; Vind, Harold P; Naval Construction Battalion Center (Port Hueneme, Calif. ). Civil Engineering Laboratory. Port Hueneme, Calif. : Civil Engineering Laboratory, Naval Construction Battalion Center
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