Assessment of Some Chromated and Non-Chromated Primers on Magnesium ZE41A, Aluminum 2024, and Steel 4340 Via Electro-Chemical Impedance Spectroscopy

Abstract

Organic coating systems are one of the most efficient methods for protecting metals from corrosion, and the use of chromate primers vastly improves corrosion protection. However, environmental concerns about hexavalent chromium (Cr+6) toxicity have led to the development of many non-chromate coatings. In recent years, water-borne coatings have emerged as viable alternatives and provide the additional advantage of having low content of volatile organic compounds. Since the performance of chromated coatings tends to exceed that of their environmentally friendly counterparts, evaluations of some non-chromate alternatives need to be performed. This report compares the performance of three military primers: MIL-P-23377C (chromated), MIL-P-85582C (chromated), and MIL-P-85582N (non-chromated) on three common military alloys.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2004
Accession Number
ADA426310

Entities

People

  • John V. Kelley

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chromium
  • Chromium Compounds
  • Coatings
  • Corrosion
  • Data Analysis
  • Impedance
  • Magnesium
  • Magnesium Alloys
  • Materials
  • Metals
  • Organic Coatings
  • Organic Compounds
  • Spectroscopy
  • Volatile Organic Compounds

Readers

  • Materials Science and Engineering.
  • Surface Coatings Technology.