The shrimp boat "Copper Mariner" has a 90-10 copper nickel (CDA 706) hull. The investigation of the corrosion of weldments in copper nickel clad steel plate has shown a high incidence of failures following one year's exposure to sea water. The failures occur at an alloy transition zone between the weld bead and the cladding layer at which coring has occurred in the newly solidified metal. The relative susceptibility of this area of the welds is correlated to the iron content of the weld beads. The iron in the weld beads results from a solvent effect of the molten weld metal puddle on the steel plate. MIG spray welds made with low nickel content 67 alloy wire show the least incidence of failures.

  • Corporate Authors:

    International Copper Research Association, Inc.

    703 Third Avenue
    New York, NY  United States  10017
  • Authors:
    • Anthony, W H
    • Popplewell, J M
    • Brock, A J
  • Publication Date: 1977-7

Media Info

  • Features: References;
  • Pagination: 47 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00174236
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 31 1978 12:00AM