Carbon steel, aluminum, and copper alloys submerged at the Inco Wrightsville Beach, North Carolina test station were evaluated for their ability to resist sea marine fouling for up to 5 years. Steel was voluminously attacked to penetration and some sloughing of corrosion products and attached fouling occurred. CuNi attachments started early and continued with sloughing and changes of organism types at intervals, apparently alternately losing and regaining power to resist. There was no marked difference in attachment rate among various Cu alloys and resistance (up to 30% of surface) attributed to toxicity of corrosion products, mainly Cu oxide. Cu, Ag, and Zn had varying resistance times and percentages. Corrosion at a Cu-painted and unpainted zone interface did not indicate Cu ions effective vs fouling on adjacent painted surfaces. Cu alloys are not susceptible to waterline attack. Passive metals corrode as a result of oxygen concentration cells beneath fouling organisms.

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  • Corporate Authors:

    National Association of Corrosion Engineers

    P.O. Box 1499
    Houston, TX  United States  77001
  • Authors:
    • Efird, K D
  • Publication Date: 1976-4

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Filing Info

  • Accession Number: 00147522
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Feb 16 1977 12:00AM