Accelerated Corrosion Analysis of Nonchromate Conversion Coatings on Aluminum Alloys 5083, 7039, and 6061 for DoD Applications

Abstract

This study examines the effectiveness of six nonchromate conversion coatings on aluminum alloys 5083, 7039, and 6061. Evaluation methods included ASTM B117 (American Society for Testing and Materials. 'Standard Method of Salt Spray Fog Testing'. ASTM B117-90, 1990) salt fog, General Motors 9540P (General Motors. General Motors Engineering Standard, Accelerated Corrosion Test. GM 9540P, July 1991) cyclic salt spray, wet adhesion, and dry adhesion on painted test panels. Conversion-coated panels without paint were also screened to assess quality and pretreatment characteristics. Differences in behavior were noted between the salt fog data and the cyclic salt spray data obtained on scribed panels. How these data may relate with implementation of nonchromate pretreatments for military vehicles is discussed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADA394482

Entities

People

  • Brian E. Placzankis
  • Christopher E. Miller
  • John H. Beatty

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Conversion
  • Corrosion
  • Corrosion Resistance
  • Department Of Defense
  • Engineering
  • Environmental Tests
  • Failure Mode And Effect Analysis
  • Materials
  • Military Research
  • Ratings
  • Standards
  • Test And Evaluation
  • Test Methods

Readers

  • Materials Science and Engineering.
  • Surface Coatings Technology.