Hydrogen Desulfurization of Nickel: Thermodynamics and Kinetics

Abstract

The presence of minute amounts of sulfur (10ppm) in nickel-base superalloys has been associated with reduced oxidation resistance and the premature spallation of protective coatings. Removal of sulfur by annealing these alloys in a hydrogen atmosphere has been successfully attempted by several researchers. This paper examines the fundamental thermodynamics and kinetics governing hydrogen desulfurization of elemental nickel. Limiting conditions for successful desulfurization are delineated. Assuming that the diffusion of sulfur is the rate limiting process of desulfurization, the effectiveness as well as time associated with hydrogen desulfurization is explored.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1993
Accession Number
ADA282581

Entities

People

  • Bruce A. Pregger
  • Thu-ha T. Mickel
  • William E. Frazier

Organizations

  • Naval Air Warfare Center Aircraft Divison

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aerial Warfare
  • Air Force
  • Aircrafts
  • Diffusion Coefficient
  • Equations
  • Gas Laws
  • Ideal Gas Law
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Engineering
  • Oxidation Resistance
  • Partial Pressure
  • Solid Solutions
  • Sulfur Compounds
  • Thermodynamics
  • Vapor Pressure

Fields of Study

  • Environmental science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Surface Coatings Technology.