Accession Number : ADA331118

Title :   Effects of Alloy Chemistry Changes on Sacrificial Aluminum Anode Performance, Tri-Service Committee on Corrosion Proceedings

Corporate Author : NAVAL SURFACE WARFARE CENTER CARDEROCK DIV ANNAPOLIS MD MARINE CORROSION BRANCH

Personal Author(s) : Murray, John N. ; Hays, Richard A. ; Smith, Douglas W.

PDF Url : ADA331118

Report Date : JUN 1994

Pagination or Media Count : 15

Abstract : The set of aluminum alloy sacrificial anodes taken from the upper starboard stern array from a Navy submarine was evaluated at CDNSWC to determine the cause of non-uniform utilization during the approximately 30 month anode service period. Physical data from the used anodes as well as electrochemical characterizations Were determined. The evidence indicated that the three distinct levels of anode weight change (and estimated discharge current) could be attributed to distinct levels of mercury contamination in the three heats of alloy from which these particular anodes were taken. The experience shows that reasonable vendor care in alloy preparation and anode casting must be taken for uniform anode performance to be achieved in multi-anode array applications.

Descriptors :   *SYMPOSIA, *ALUMINUM ALLOYS, *CATHODIC PROTECTION, ELECTROCHEMISTRY, WEIGHT, SUBMARINES, ANODES, SHIP STERNS.

Subject Categories : Physical Chemistry
      Properties of Metals and Alloys
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE