PROCESSING-PLATING SYSTEMS-UNCLAD 2020 ALUMINUM ALLOY-CHEMICAL AND PHYSICAL PROPERTIES-EVALUATION OF

Abstract

Studies were made to evaluate the plating methods and plate properties of various plating systems for unclad X-2020 Al alloy exposed to elevated and room temperature heat soak treatments. Specimens of X-2020 Al alloy were plated by procedures employing (1) no pretreatment of basis metal and (2) sodium zincate pretreatment of basis metal. The specimens were plated with Cr and Sn by standard electrolytic methods and with electroless Ni by the Alkaline type, modified Hydrac type, and Dow Process type baths. Plated specimens were then exposed to 100-hr heat soak performance tests at temperatures up to 350 F and subsequently evaluated for plating adhesion and corrosion resistance. Visual observations and tape stripping test results revealed that the platings applied to X-2020 aluminum by the direct method (no pretreatment) exhibited extremely poor adhesion.

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Document Details

Document Type
Technical Report
Publication Date
Jan 16, 1962
Accession Number
AD0272099

Entities

People

  • W. L. Armstrong

Organizations

  • General Dynamics

Tags

DTIC Thesaurus Topics

  • Acids
  • Alloys
  • Aluminum Alloys
  • Chemical Synthesis
  • Chemistry
  • Chromium
  • Corrosion Resistance
  • Current Density
  • Galvanic Corrosion
  • Hydroxides
  • Materials
  • Performance Tests
  • Physical Properties
  • Sodium Compounds
  • Sodium Hydroxide
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Surface Coatings Technology.
  • Surface Engineering/Surface Coating Technology.