Unclassified 



Sctunlv Classifu 



DOCUMENT CONTROL DATA - R i D 



IMaval Civil Engineering Laboratory 

 Port Hueneme, California 93041 



Unclassified 



CATHODIC PROTECTION SYSTEM FOR FLEET MOORINGS 



5CRIPT1VE NOTES (Typa of report and inctualve dalea) 



Final; January 1964 to February 1970 



THonisi (FirtI rtmme, middle Irtlllel, lael name) 



R. W. Drisko 



November 1970 



53 



i. PROJECT r.o YF 51.543.006.01.007 



TR-702 



I (Any or/ier numbe 



This document has been approved for public release and sale; its distribution is unlimited. 



Naval Facilities Engineering Command 

 Washington, D. C. 20390 



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. 



DD 



.,1473 



Unclassified 



S/N 0101.807.6801 



