Failure Rate Model for Cathodic Delamination of Protective Coatings

Abstract

In order to improve the reliability of wet-end sonar components, the mechanisms for cathodic delamination of rubber-to-metal bonds are studied. A quantitative model for the rate of delamination is proposed. This model is based on the kinetics of the many contributing chemical processes as well as diffusion processes which lead to the failure of the protective coating. The model is solved under a set of assumptions which simplify the differential equations. However, a numerical solution to the complete set of equations would be possible. It is concluded that it will be feasible to understand and quantify the failure process in sufficient detail to formulate design specifications for protective coatings on sonar transducers which will extend the service life of equipment. It is also concluded that better testing procedures could be applied in the evaluation of future candidates for polymeric bonding systems.

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Document Details

Document Type
Technical Report
Publication Date
May 30, 1985
Accession Number
ADA157483

Entities

People

  • J. F. Cartier
  • J. S. Thornton
  • R. E. Montgomery

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Adhesion
  • Adhesives
  • Chemical Synthesis
  • Chemistry
  • Coatings
  • Differential Equations
  • Diffusion
  • Equations
  • Failure Mode And Effect Analysis
  • Kinetics
  • Materials
  • Organic Coatings
  • Polymers
  • Protective Coatings
  • Sonar Equipment
  • Sonar Transducers
  • Test And Evaluation

Readers

  • Computational Modeling and Simulation
  • Surface Coatings Technology.