An Interdisciplinary Study of Cathodic Debonding in Elastomer/Metal Adhesive Bonds

Abstract

An interdisciplinary study concerning the durability of adhesively elastomer/metal bonded joints in marine environments is reported. The generation of OH-ions at the bondline due to an imposed cathodic current from an external source is suspected to be the predominant cause of failure. A surface analysis study was performed early in this research for the purpose of identifying the cause(s) of failure. Characterization of the rubber and the metal failure surfaces with XPS (X-ray Photoelectron Spectroscopy) showed similar composition on both sides and to that of the bulk degraded primer component of the adhesive. Saponification of the adhesive and the leaching of chlorine (forming HCI that attacks the oxide) are identified as two possible failure mechanisms. The locus of failure is believed to be very close to the adhesive/oxide interface.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1988
Accession Number
ADA202376

Entities

People

  • D. A. Dillard
  • Ramzi F. Hamadeh

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Adhesives
  • Body Weight
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Electrochemical Reactions
  • Failure Mode And Effect Analysis
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • X Ray Photoelectron Spectroscopy

Readers

  • Analytical Chemistry
  • Surface Coatings Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene