Accession Number:

ADA238470

Title:

The Microstructure and Corrosion Resistance of Ion Implanted Aluminum- Molybdenum Alloys Containing the Phase Al12Mo

Descriptive Note:

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH

Personal Author(s):

Report Date:

1991-02-27

Pagination or Media Count:

26.0

Abstract:

For solid solution iron base alloys with chromium formed by either ion implantation or bulk melting, the corrosion behavior in aqueous chloride solution can be represented by potentiodynamic polarization measurements. this was established by comparing the potential-pH diagrams obtained in this study to published Pourbaix diagrams of potential versus pH for the appropriate systems. Analytical electron microscopy revealed that continuous films of the phase Al12Mo with either a mottled, metastable microstructure or a granular, stable microstructure formed in aluminum annealed at selected temperatures after implantation with a maximum molybdenum concentration in the range of 8 to 10 atomic percent. The corrosion behavior of specimens containing either of these two types of continuous films with or an as-implanted microstructure was characterized in aqueous solutions with or without 0.1 molar chloride ion at pH6 or pH63 using potentiodynamic polarization techniques.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE