A Study of Zn/Sn EMI (Electromagnetic Interference)-Seal Material

Abstract

Electromagnetic interference (EMI) seals are required for the Navy's F/A-18 aircraft because of the high electromagnetic environment present on aircraft carriers. A major component used in the EMI seal is a 20% Zinc/Tin- spray coating on a Aluminum alloy substrate. This is continuously exposed to the marine environments causing major structural damages. Pits up to 35 mils deep on the Al alloy have been observed under the seal after one year of service on F/A- 18 aircraft. A study of this 20% Zn/Sn arc-spray coating material was made to evaluate its compatibility with the substrate metal in marine environments. Glass bead blasting and Corrosion Preventative Compound, MIL-C-81309, were investigated as a possible post-treatment of this coating to increase service the life of the EMI seal.

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Document Details

Document Type
Technical Report
Publication Date
Apr 17, 1986
Accession Number
ADA180321

Entities

People

  • James J. Thompson
  • Richard Paciej
  • Vinod S. Agarwala

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircraft Carriers
  • Aircrafts
  • Aluminum
  • Aluminum Alloys
  • Anodic Polarization
  • Arc Spraying
  • Classification
  • Coatings
  • Corrosion
  • Electromagnetic Environments
  • Electromagnetic Interference
  • Materials
  • Naval Air Stations
  • Polarization
  • Security
  • Substrates

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Surface Engineering/Surface Coating Technology.