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Atmospheric corrosion.

H Eyring1, B Robertson, C C Chu

  • 1Department of Chemistry, University of Utah, Salt Lake City, Utah 84112.

Proceedings of the National Academy of Sciences of the United States of America
|February 1, 1974
PubMed
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A new model explains electrolytic corrosion by showing that conducting channels follow an autocatalytic equation. This model unifies many experimental observations in corrosion science.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Electrolytic corrosion is a significant degradation process affecting various materials.
  • Understanding the mechanisms of electrolytic corrosion is crucial for material protection and longevity.

Purpose of the Study:

  • To develop a mathematical model for electrolytic corrosion.
  • To elucidate the role of electrically conducting channels in the corrosion process.
  • To unify diverse experimental observations under a single theoretical framework.

Main Methods:

  • Development of a theoretical model for electrolytic corrosion.
  • Mathematical formulation based on reactant catalysis by its product.
  • Comparison of model predictions with existing experimental data.

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Main Results:

  • The model demonstrates that conducting channels in the oxide layer follow an autocatalytic equation.
  • The derived autocatalytic equation accurately describes experimental observations.
  • The model provides a unified explanation for various corrosion phenomena.

Conclusions:

  • The developed model offers a comprehensive understanding of electrolytic corrosion.
  • The autocatalytic nature of conducting channels is a key factor in the corrosion process.
  • This unified model has broad applicability in predicting and mitigating material corrosion.