CATHODIC PROTECTION OF CARGO/BALLAST TANKS OF CRUDE OIL TANKERS

Unless special protection is provided, pitting corrosion may occur at the upper side and the bottom of ballast tanks. Usually a partial coating (horizontal areas) is used in connection with cathodic protection by sacrifical anodes. More than two years' observation of coated and uncoated cathodically protected containers has shown that anode efficiency is generally better than 90% and in many cases as high as 100%. The current densities measured depend on where the measurements are performed. They are usually higher at the bottom, especially when the bottom is coated. Measurements of protective current density vs potential can be used to calculate the protective current requirements for horizontal and vertical surfaces.

  • Corporate Authors:

    Verlag Chemie GmbH

    Bergstrasse
    Weinheim,   Germany 
  • Authors:
    • De Wazard, C
    • Posch, W
  • Publication Date: 1972-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00046657
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 31 1973 12:00AM