MATERIALS-UNCLAD 2020 ALUMINUM ALLOY CORROSION PROTECTIVE SURFACE TREATMENT FOR-DETERMINATION OF

Abstract

Various protective coatings for unclad 2020 Al alloy were evaluated. Type II H2SO4 Anodic Coating imparts satisfactory corrosion resistance to unclad 2020 Al alloy. Alodine 1200 Chemical Film Treatment provides adequate protection to salt spray environment in accordance with Mil-C5541. However, the treatment does not prevent a considerable reduction in % elongation after humidity exposure. Type I H2CrO4 Anodic Coating on unclad 2020 Al alloy fails to meet the requirements of Mil-A-8625A.

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Document Details

Document Type
Technical Report
Publication Date
Nov 24, 1958
Accession Number
AD0286840

Entities

People

  • J. D. Reynolds

Organizations

  • General Dynamics

Tags

DTIC Thesaurus Topics

  • Acids
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Anodic Coatings
  • Chromic Acid
  • Coatings
  • Corporations
  • Corrosion
  • Corrosion Resistance
  • Dynamics
  • Elongation
  • Government Procurement
  • Humidity
  • Protective Coatings
  • Surface Finishing
  • Yield Strength

Readers

  • Materials Science and Engineering.
  • Surface Coatings Technology.
  • Surface Engineering/Surface Coating Technology.