The Role of Brittle Surface Films in Stress-Corrosion Phenomena

  • E. N. Pugh
  • A. J. Sedriks
Part of the Sagamore Army Materials Research Conference Proceedings book series (SAMC, volume 14)


Recent research has indicated that stress-corrosion cracking in several systems may occur by the repeated formation and rupture of a brittle surface film. In this paper, evidence is presented which suggests that this film-rupture model is operative in the failure of alpha brass in tarnishing ammoniacal environments, alpha-phase titanium alloys in liquid nitrogen tetroxide, and the non-metal silver chloride in certain complex-forming aqueous solutions. In the case of the metals the brittle film is an oxide (Cu2O and TiO2, respectively), and for AgCl it is a defect-hardened charge double layer. Other evidence is described which suggests that this mechanism may also be operative in other systems, e.g., austenitic stainless steel and magnesium-aluminum alloys in chloride-containing environments.


Silver Chloride Cuprous Oxide Film Rupture Ammoniacal Solution Intercrystalline Fracture 
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Copyright information

© Syracuse University Press Syracuse, New York 1968

Authors and Affiliations

  • E. N. Pugh
    • 1
  • A. J. Sedriks
    • 1
  1. 1.Research Institute for Advanced StudiesMartin Marietta CorporationBaltimoreUSA

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