The Preparation of Chromium by the Thermal Decomposition of Chromium Iodide

Abstract

This memorandum describes a method for the preparation of crystalline metallic chromium of a considerable degree of purity by the interaction of powdered electrolytic chromium with iodine vapor, the sublimation of the chromium iodide, and its subsequent decomposition on a hot tungsten filament, all in an evacuated quartz apparatus. This represents a new application of a process previously used for the preparation of zirconium by de Boer and Fast. The chromium thus prepared contains oxygen equivalent to 0.117 percent Cr2O3.

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Document Details

Document Type
Technical Report
Publication Date
Nov 26, 1943
Accession Number
ADB334972

Entities

People

  • Don R. Mosher

Tags

DTIC Thesaurus Topics

  • Chromic Acid
  • Chromium
  • Decomposition
  • Filaments
  • High Temperature
  • Low Temperature
  • Materials
  • Mechanical Properties
  • Munitions
  • National Security
  • Navy
  • Ordnance Laboratories
  • Oxygen
  • Temperature Gradients
  • Tungsten
  • Vapor Pressure
  • Vapors

Readers

  • Surface Engineering/Surface Coating Technology.
  • Thermal Physics or Thermal Science.