Accession Number:

ADA214267

Title:

An XPS and Electrochemical Study of the Influence of Molybdenum and Nitrogen on the Passivity of Austenitic Stainless Steel

Descriptive Note:

Technical rept.

Corporate Author:

STATE UNIV OF NEW YORK AT STONY BROOK DEPT OF MATERIALS SCIENCE AND ENGINEERING

Report Date:

1989-10-24

Pagination or Media Count:

13.0

Abstract:

In previous surface studies of N bearing stainless steels exposed to acidic environments we have determined that N is anodically segregated as a surface nitride phase. In this paper we have focused on the nature of the surface nitride and its role in the passivity of each of the constituent elements comprising a Mo bearing stainless steel. To facilitate this study, surface nitrides were generated electrochemically at room temperature on the surface of high purity samples of Cr, Mo, Fe and Ni and on the surface of types 304, 317LX, 904L and A16X stainless steels. The effect of the surface nitriding treatment on the anodic kinetics of the stainless steels was in close agreement with the effect of N alloying. The surface nitriding of Cr resulted in the complete elimination of the active nose in deaerated 0.1 MHC1. Nitride Molybdenum Stainless steel. jes

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE