Zirconium alloy corrosion and hydrogen pickup

Arthur T. Motta, Adrien Couet

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


During operation nuclear fuel rods are immersed in the primary water, causing waterside corrosion and consequent hydrogen ingress. The mechanisms of corrosion and hydrogen pickup and the role of alloy selection in minimizing both phenomena are considered, based on two principal characteristics: the pre-transition kinetics and the loss of oxide protectiveness at transition. In zirconium alloys very small changes in composition or microstructure can cause significant corrosion differences, so that corrosion performance is strongly alloy dependent. The alloys show different, but reproducible sub-parabolic pre-transition kinetics and transition thicknesses. A mechanism for oxide growth and breakup based on a detailed study of the oxide structure can explain these results. Using the recently developed Coupled Current Charge Compensation model of corrosion kinetics and hydrogen pickup, the sub-parabolic kinetics and the hydrogen fraction can be rationalized: hydrogen pickup increases when electron transport decreases, requiring hydrogen ingress to close the reaction.

Original languageEnglish (US)
Pages (from-to)1006-1008
Number of pages3
JournalTransactions of the American Nuclear Society
Issue number1
StatePublished - 2016
Event2016 Transactions of the American Nuclear Society Annual Meeting, ANS 2016 - New Orleans, United States
Duration: Jun 12 2016Jun 16 2016

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality


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