Effects of Low Chromium(III) Concentration in Electrodeposition of Low Contraction Chromium

Abstract

The effects of low chromium (Cr) (III) concentrations on the electrodeposition of low contraction (LC) chromium were studied. A systematic experiment was performed with a Cr (III) concentration range of 0.8 to 10.2 g/1 and the following standard LC plating parameters: 250-g/1 chromic acid solution, 97-A/dm2 current density, and 85 C bath temperature. On the basis of mechanical properties and the microstructure of the deposits, it was found mechanical properties and the microstructure of the deposits, it was found that lower Cr(III) concentrations yielded higher hardness values, lower tensile strengths, and decreased current efficiencies. The grain size of the deposits also became larger as the Cr(III) concentration decreases. Keywords: Low contraction, Electrodeposition, Chromium.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA223338

Entities

People

  • M. D. Miller
  • S. K. Pan

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chromic Acid
  • Chromium
  • Classification
  • Coatings
  • Efficiency
  • Electrodeposition
  • Engineering
  • Grain Size
  • Hardness
  • Mechanical Properties
  • Mechanics
  • Microstructure
  • Military Research
  • Plating
  • Security
  • Tensile Strength

Readers

  • Mathematics or Statistics
  • Surface Engineering/Surface Coating Technology.