Determination of Sulfuric Acid in Chromium Plating Solutions Using Gravimetric Analysis

Abstract

The determination of sulfuric acid in chromium plating solutions is studied in the presence of chromic acid. Cr(III) ions. and Fe(III) ions. The control of the concentration of these four chemical components is necessary to optimize the chromium plating process. In the absence of expensive chemical instrumentation. a gravimetric method suitable for this industrial application is developed in this report. This method uses chromic acid reduction and sulfate precipitation and is a modified version of the standard sulfate Precipitation analysis since it allows the presence of chromic acid. The optimum operating range of sulfuric acid is 2.40 to 3.10 all. and the resulting precisions are in the range of 0.24 to 0.31 g/1 providing marginal control of these plating solutions supported by seven years of testing.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1991
Accession Number
ADA419951

Entities

People

  • Samuel Sopok

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Cyber

DTIC Thesaurus Topics

  • Acids
  • Analytical Chemistry
  • Analytical Chemistry Techniques
  • Barium
  • Barium Compounds
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Chromic Acid
  • Chromium
  • Chromium Compounds
  • Crucibles
  • Engineering
  • Filter Paper
  • Gravimetric Analysis
  • Information Security
  • Precipitation

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Surface Engineering/Surface Coating Technology.
  • Systems Analysis and Design