Accession Number : AD0715346

Title :   Cathodic Protection System for Fleet Moorings.

Descriptive Note : Final rept. Jan 64-Feb 70,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s) : Drisko,R. W.

Report Date : NOV 1970

Pagination or Media Count : 57

Abstract : A cathodic protection system was developed for protecting from corrosion both the underwater portion of a mooring buoy and its ground tackle. The final design of this system protected both buoy and chain for 3-1/ 2 years, and sufficient zinc appeared to remain for at least another 6-1/2 years of protection. The system performed well on both a sandy and a muddy bottom. The zinc anodes used on the ground tackle were specially cast on steel chain links to become an integral part of the chain system. The tight riser-chain secured to the peg-top buoy had the required electrical continuity to permit the necessary flow of current for protection, but it was necessary to use a steel cable woven through the links of each ground leg to achieve electrical continuity there. A cost analysis indicates that use of such a cathodic protection system can result in a considerable reduction in costs associated with maintenance of Fleet moorings. (Author-PL)

Descriptors :   (*MOORING BUOYS, *CATHODIC PROTECTION), ANODES, MAGNESIUM, ZINC, ANCHORS(MARINE), ANCHOR CHAINS, COST EFFECTIVENESS

Subject Categories : Fabrication Metallurgy
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE