The reproducibility of corrosion testing in supercritical water—Results of a second international interlaboratory comparison exercise

M. Edwards, S. Rousseau, R. Novotný, B. Gong, M. Fulger, Sami Penttilä, Aki Toivonen, A. Sàez-Maderuelo, L. Zhang, D. Guzonas, X. Huang

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Supercritical water-cooled reactor candidate materials are typically corrosion-resistant alloys whose mass changes in supercritical water fluctuate around zero. A previous interlaboratory corrosion experiment exercise revealed large scatter in mass change results between laboratories. Here, we reduced systemic differences between laboratories by unilateral preparation of coupons and unilateral chemical cleaning. Type 310S stainless steel and Alloy 800HT test coupons were exposed for 1000 h to 550 °C, 25 MPa, deaerated water. Average mass loss for 310S and 800HT was 38 ± 26 and 51 ± 31 mg/dm2, respectively. Differences in mass transfer, galvanic and local corrosion, and average coupon temperature may explain the poor reproducibility.

Original languageEnglish
Article number153759
JournalJournal of Nuclear Materials
Volume565
DOIs
Publication statusPublished - Jul 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • High temperature corrosion
  • Mass loss
  • Nickel
  • SEM
  • Stainless steel

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