Corrosion of Aluminum Alloys by IRFNA

Abstract

The corrosion of 2014 aluminium alloy in gelled IRFNA has been studied. Six electrochemical cells have been set up (GA 1-6). E corr and I corr have been measured and electrochemical impedance spectra have been recorded for the cells. It has been demonstrated that 2014 aluminium alloy undergoes intergranular attack in gelled IRFNA. The alloy shows an initially high corrosion rate which decreases with exposure. Two surface pretreatments, HF/F2 gas treatment and electropolishing and anodising, have been studied. Neither had a significant long term effect on the corrosion rate of 2014 aluminium alloy in gelled IRFNA. Keywords: Alloy, Gelled IRFNA, Electrochemical impedance, Corrosion potential, Corrosion current, Corrosion rate, Intergranular attack, Surface pre-treatment, HF/F2 gas, Electropolishing and anodising.

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Document Details

Document Type
Technical Report
Publication Date
Feb 24, 1990
Accession Number
ADA223011

Entities

People

  • Jeremy P. Mauger
  • Michael F. Dove
  • Norman Logan

Organizations

  • University of Nottingham

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Anodizing
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Chemistry
  • Corrosion
  • Electrochemical Cells
  • Electrodes
  • Electron Spectroscopy
  • Elements
  • Frequency
  • Impedance
  • Metals
  • Oxide Films
  • Spectra

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.