On the role of water, temperature, and glass transition in the corrosion protection behavior of epoxy coatings for underground pipelines

Hung M. Ha, Akram Alfantazi

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Water transport kinetics in the coatings were markedly enhanced and the coating impedances decreased exponentially as temperature increased. The effect of temperature on the coating impedance was attributed to the change in the defect area fraction caused by the thermal expansion of the polymers. The temperature dependence of coating impedance was reversible in a non-aqueous environment but was irreversible in an aqueous environment. This is attributed to the plasticization effect of water on the polymer chains. The effect of glass transition on coating impedances during a short period of exposure to heat source was insignificant.

Original languageBritish English
Pages (from-to)1095-1110
Number of pages16
JournalJournal of Coatings Technology and Research
Volume12
Issue number6
DOIs
StatePublished - 1 Nov 2015

Keywords

  • Corrosion
  • Degradation
  • Glass transition
  • High temperature
  • Polymer coatings

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