Degradation of epoxy pipe coatings due to diffusion of chemicals

D. I. Verrelli

Research output: Contribution to journalArticlepeer-review

Abstract

Concrete pipes are commonly protected by a coating of epoxy, or some other barrier. However, these coatings are subject to degradation by a variety of means. One important route is by diffusion of chemical species. This article reviews the state of knowledge on degradation of coatings due to diffusion, in order to provide an accessible context for recent publications on this topic. Specific caution must be taken in considering the model of diffusion to apply, implementation of the model, and the mode of failure. Solubilities should be estimated besides diffusivities: solubilities are especially important if the coating fails due to liquid pooling and blistering.
Original languageEnglish
Pages (from-to)63-67
Number of pages5
JournalWater : journal of the Australian Water Association
Volume39
Issue number3
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • degradation
  • epoxy coatings
  • Fick's law of diffusion
  • modelling

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