Water Disbondment Characterization of Organic Coating/Metal Substrate Systems.

Abstract

The adhesion of many organic coatings to metal substrates is adversely affected by exposure to an aqueous environment. Even high relative humidities can cause coating disbondment to occur. The mechanism behind this adhesion loss is the accumulation of water molecules at small preexisting unbonded areas at the coating under a concentration gradient, condenses in these areas and causes them to grow. As these areas grow laterally, they cause stresses to occur at the coating/substrate interface which eventually leads to the specific coating makes with the substrate the more resistant that system is to water disbondment.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 1987
Accession Number
ADA184847

Entities

People

  • Stephen J. Spadafora

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Adhesion
  • Adhesives
  • Chemical Synthesis
  • Chemistry
  • Coatings
  • Environment
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Molecules
  • Naval Air Stations
  • Organic Coatings
  • Resins
  • Substrates
  • Test Methods

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Coatings Technology.