Development of a Mathematical Model of Crevice Corrosion Propagation on Nickel Base Alloys in Natural and Chlorinated Sea Water

Abstract

Crevice corrosion initiation and propagation of nickel base alloys Inconel 625, Hastelloy C276 and Hastelloy 22 in sea water and chlorinated sea water has been studied by exposure tests, electrochemical studies, surface analysis and mathematical modelling. The initiation of attack has been shown to be a function of crevice geometry and surface composition and has been successfully predicted by the modelling route. A mechanism of propagation has been suggested which successfully predicts large differences in the corrosion rate of Inconel 625 for relatively small changes in crevice geometry and temperature. This work is being further developed under the project expansion.

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Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1994
Accession Number
ADA284715

Entities

People

  • J. W. Oldfield

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Advanced Materials
  • Beds (Process Engineering)
  • Bromine Compounds
  • Chemical Synthesis
  • Chemistry
  • Corrosion
  • Corrosion Resistance
  • Electrodes
  • Materials
  • Mathematical Models
  • Polarization
  • Resistance
  • Sea Water
  • Stainless Steel
  • Steady State
  • Surface Analysis
  • Surface Roughness

Fields of Study

  • Materials science

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Modeling and Simulation
  • Surface Engineering/Surface Coating Technology.