MATTING OF ALUMINUM AND ITS ALLOYS

Abstract

The report covers a study of film formation kinetics and the properties of anodic oxide films produced in an oxalic acid electrolyte with the titanium salt TiO(KC2O4)2. 2H2O on aluminum AD-1 and Al alloys AMtsM and D16-T (unclad). Samples were wiped with benzine, chemically degreased (bath compositions given, 3 min., 60-70C for unpolished and 3-5 min., 70-80C for polished samples), hot and cold water rinsed, bleached (1-2 min., 40-50% HNO3, 18-20C), then anodized (bath composition given). The optimal conditions were 55C and 40 min. at 2 a/sq dm or 30 min. at 3 a/sq dm. Corrosion resistance was high and increased with process duration. Increasing the pH to a value of 3 did not affect film quality. Corrosion resistance, abrasive and friction wear, hardness, volume resistivity and dielectric strength characteristics of these films were better than for standard oxide films produced in sulfate or oxalate baths.

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Document Details

Document Type
Technical Report
Publication Date
Mar 17, 1967
Accession Number
AD0651088

Entities

People

  • S. I. Shames

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acids
  • Aluminum
  • Aluminum Alloys
  • Chemistry
  • Corrosion Resistance
  • Current Density
  • Dielectric Strength
  • Dielectrics
  • Hardness
  • Material Degradation Processes
  • Materials
  • Mechanical Properties
  • Metals
  • Oxidation
  • Oxide Films
  • Standards
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Surface Coatings Technology.
  • Thin Film Deposition Science.