Non-Chromate Aluminum Pretreatments

Abstract

Aluminum finishing in Department of Defense applications utilizes chromate chemistries for anodizing, anodic sealing, and pretreatment (both for conversion coating aluminum substrates and for treating aluminum-based coatings deposited on steel). The most ubiquitous use of chromate coatings is in the conversion coating of aluminum alloys for use as-deposited or prior to organic coating application. These coatings are very thin, inexpensive to produced, and can be applied by immersion, spray and wipe techniques. However, chromate conversion coatings contain hexavalent chromium, a known carcinogen. National and international regulations are restricting the use of this material. This report presents the results of laboratory and field tests to demonstrate and validate several non-chromate aluminum pretreatments.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2012
Accession Number
ADA582070

Entities

People

  • Craig Matzdorf
  • William Nickerson

Organizations

  • Naval Air Systems Command

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Ground and Sea Platforms
  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Airframes
  • Chemical Synthesis
  • Chemistry
  • Commercial Aircraft
  • Corrosion
  • Corrosion Inhibition
  • Corrosion Resistance
  • Environmental Protection
  • Fighter Aircraft
  • Materials
  • Materials Engineering
  • Military Research
  • Salt Spray Tests
  • Surface Properties
  • Test And Evaluation
  • Test Facilities
  • Test Methods

Readers

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  • Surface Coatings Technology.