Efficacy of Two Novel Anodic Coatings for Enhanced Corrosion Protection of Aluminum Armor Alloys

Abstract

The purpose of this effort is to assess the efficacy of novel anodic coatings for military applications. The intent is to explore alternatives to hexavalent chromium pretreatments and sealing methods for anodizing. For this work, various sized Al A2024-T351 and Al A5083 substrates were subjected to the proprietary anodic coating process. The two coatings were designated silicon (Si) and silver (Ag) by the manufacturer. Each coating type was supplied to the U.S. Army Research Laboratory (ARL) in a range of thicknesses. The corrosion performance was characterized using electrochemical techniques, and ASTM B 117 salt fog exposure. The adhesion of an organic coating was determined using pull-off adhesion. All variations of the coatings provided some barrier protection, at least initially, and provided a good adhesive surface sufficient for military coatings.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2014
Accession Number
ADA597719

Entities

People

  • Elizabeth A. Charleton
  • John V. Kelley
  • Paul Huang
  • Steven M. Kilczewski

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical

DTIC Thesaurus Topics

  • Adhesion
  • Adhesives
  • Aluminum
  • Aluminum Alloys
  • Anodic Coatings
  • Chromium Compounds
  • Corrosion
  • Corrosion Resistance
  • Current Density
  • Department Of Defense
  • Electrochemical Cells
  • Failure Mode And Effect Analysis
  • Metals
  • Military Applications
  • Military Research
  • Organic Coatings
  • Substrates

Fields of Study

  • Materials science

Readers

  • Electrochemical Surface Science
  • Surface Coatings Technology.