Corrosion product formation on zinc-coated steel in wet supercritical carbon dioxide

Ville Saarimaa, Aaretti Kaleva, Arnold Ismailov, Tero Laihinen, Markus Virtanen, Erkki Levänen, Pasi Väisänen

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In a wet supercritical carbon dioxide atmosphere, carbon dioxide is dissolved into water and causes corrosion of zinc-coated steel. The first corrosion products appeared in singular nano-scale initiation sites, which gradually grew in number and size and ultimately covered the whole surface. Zinc hydroxy carbonate was detected as a rapidly forming needle-like corrosion product, which prevailed at short exposure times (from minutes to hours). A prolonged exposure caused conversion of zinc hydroxy carbonate to anhydrous zinc carbonate with high crystallinity and a stable, dense layer was formed on zinc. The chemical transition from zinc hydroxy carbonate to anhydrous carbonate was reported for the first time and is in the light of current literature unique for wet scCO2 atmosphere.

Original languageEnglish
Article number103636
JournalArabian Journal of Chemistry
Issue number3
Early online date2021
Publication statusPublished - Mar 2022
Publication typeA1 Journal article-refereed


  • Carbonate
  • Corrosion
  • Hot dip galvanizing
  • Supercritical CO
  • Zinc

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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