A Study of Manganese Phosphating Reactions

Abstract

Work was conducted to determine the composition of and the reactions associated with the formation of manganese-phosphate coatings. An improved phosphate coating was studied as produced from a stock manganese phosphating bath to which an addition of manganese citrate, tartrate, or gluconate was made. Processing was accomplished in an autoclave at temperatures above 212F with steam pressure. The coatings produced by conventional and pressure methods were examined by differential thermal analysis, X-ray diffraction, and atomic absorption analysis. The chemical structure of the conventional coating was Fe3(PO4)2.2MnHPO4.4H2O, a form of hureaulite, and that of the pressure phosphate coating was mainly manganese phosphate heptahydrate, Mn3(PO4)2.7H2O.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1971
Accession Number
AD0731482

Entities

People

  • Joseph Menke

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Autoclaves
  • Chemical Reactions
  • Corrosion
  • Corrosion Resistance
  • Differential Thermal Analysis
  • Diffraction
  • Equations
  • Hydrogen
  • Ions
  • Manganese
  • Materials
  • Organic Compounds
  • Sugar Acids
  • Thermal Analysis
  • X Rays
  • X-Ray Diffraction

Readers

  • Combustion and Flow Dynamics.
  • Materials Science and Engineering.
  • Surface Coatings Technology.