Accession Number:

AD0737587

Title:

Ultrafine Grain Size Effects on Corrosion Behavior.

Descriptive Note:

Technical rept.,

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

30.0

Abstract:

The corrosion behavior of copper alloy 1.0 Cr -0.10 Cb - 0.075 Ti in grain size range 1.45 to 12.3 micrometers and 1010 carbon steel 1.0Cb - 0.60 Mn in grain size range 0.92 to 77.0 micrometers has been investigated by means of anodic polarization measurements. Based on the anodic polarization measurements, a model is proposed which relates grain size to the critical current densitygrain boundary length in one square centimeter. The model indicates that as grain size increases the apparent grain boundary current will increase and suggests finer grain size alloys will be more corrosion resistant and have longer periods of crack incubation. Selected metallographic studies and potential-time measurements were made. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE