Accession Number:

AD0636412

Title:

DEEP-OCEAN BIODETERIORATION OF MATERIALS. PART IV. ONE YEAR AT 6,800 FEET.

Descriptive Note:

Technical rept. Mar 64-Mar 66.

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s):

Report Date:

1966-06-01

Pagination or Media Count:

51.0

Abstract:

The report covers the data obtained after exposing metallic and nonmetallic specimens for 13 months on the floor of the Pacific Ocean at a depth of 6,800 feet Test Site 1. The specimens were attached to a Submersible Test Unit that was retrieved in February 1965. Preliminary examination of the specimens was made aboard ship, and the final examination, tests and analyses were performed at the Naval Civil Engineering Laboratory. On recovery, most of the plastic materials and all of the rope specimens were covered with bacterial slime. Cotton and manila rope specimens were severely deteriorated by marine microorganisms. Wooden test panels, plastics, and manila ropes were attacked by molluscan borers. Glass, metals, natural and butyl rubber, and certain plastic materials were not adversely affected. The results of breaking-strength tests on ropes, weight loss measurements of wood panels, moisture absorption tests on plastics, and insulation resistance and voltage breakdown tests on electrical insulating materials are presented. Author

Subject Categories:

  • Biology
  • Biological Oceanography
  • Laminates and Composite Materials
  • Textiles
  • Metallurgy and Metallography
  • Wood, Paper and Related Forestry Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE