APPLICATION OF POTENTIOSTATIC AND GALVANOSTATIC TECHNIQUES TO THE STUDY OF INTERGRANULAR CORROSION IN HIGH STRENGTH ALUMINUM ALLOYS.

Abstract

The effect of slow quenching following solution heat treatment on naturally aged Al-Cu-Mg alloy can be detected by corrosion potentials and accelerated corrosion tests for intergranular corrosion and stress corrosion susceptibility. Faster quenching rates give no indication of the existence of any continuous anodic paths until a stress is applied. A possible mechanism for this is proposed based on the electrochemical effect of stress which is believed to be the result of strain induced depolarization of the anodic phase or phases and stress induced increase in the surface activity of hydrogen ions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 29, 1965
Accession Number
AD0476857

Entities

People

  • Sara J. Ketcham

Organizations

  • Naval Air Engineering Station Lakehurst

Tags

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Corrosion
  • Depolarization
  • Heat Treatment
  • Hydrogen
  • Ions
  • Protons
  • Quenching
  • Solution Heat Treatment
  • Stress Corrosion

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design