Mechanisms of Corrosion of Copper-Nickel Alloys in Sulfide-Polluted Seawater

Abstract

We have investigated the importance and effects of various variables on the corrosion mechanism of two copper/nickel alloys, CA706 (90%Cu-10%Ni) and CA715 (70%Cu-30%Ni) in seawater. The variables investigated were dissolved oxygen content, sulfide content, pH, flow velocity, sulfide preexposure, various sulfide species, and simultaneous exposure to sulfide and oxygen. The presence of sulfide in seawater was found to prevent formation of the protective corrosion product that normally forms on copper/nickel alloys, Therefore, when both sulfide and oxygen were present in the seawater, the corrosion of the alloys was greatly accelerated. A qualitative model was developed to explain the mechanism of uniform corrosion of copper/nickel alloys in various seawater environments. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1981
Accession Number
ADA096865

Entities

People

  • B. C. Syrett
  • L. E. Eiselstein
  • R. D. Caligiuri
  • S. S. Wing

Organizations

  • SRI International

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Copper Nickel Alloys
  • Corrosion Resistance
  • Electron Microscopy
  • Fluid Flow
  • Linear Polarization
  • Materials
  • Materials Science
  • Measurement
  • Nickel Alloys
  • Oxidation Reduction Reactions
  • Oxide Films
  • Oxides
  • Protons
  • Scanning Electron Microscopy

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.