Stress Corrosion Cracking of Titanium Alloys in Methanol-HCl Solutions.

Abstract

Titanium alloys 8Al-1Mo-1V, 6Al-6V-2Sn, and 13V-11Cr-3Al were susceptible to stress corrosion cracking (SCC) in methanol + HCl solutions. The all-beta alloy 13V-11Cr-3Al was most susceptible followed by alpha-beta 6Al-6V-2Sn and alpha 8Al-1Mo-1V (10% beta distributed at grain boundaries). SCC can be prevented by additions of both water and NaNO3 which behave as anodic inhibitors. Similarities in activation energy for dissolution and SCC, the alleviation of SCC by applied cathodic potentials, and the stimulation of SCC by applied anodic potentials, and the inhibiting effect of both water and NaNO3 additions are all evidence in favor of an electrochemical mechanism for the SCC of these alloys in methanol + HCl solutions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1971
Accession Number
AD0729799

Entities

People

  • David W. Seitz Jr.
  • Gilbert N. Sklover
  • Milton Levy

Organizations

  • United States Army Research Laboratory

Tags

DTIC Thesaurus Topics

  • Alcohols
  • Alloys
  • Corrosion
  • Grain Boundaries
  • Heat Of Activation
  • Methanols
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Organic Chemistry
  • Surface Coatings Technology.