Evaluation of hydrothermally-deposited zirconium oxide coatings to mitigate intergranular stress corrosion cracking in BWR environments

P. H. Chou, R. Pathania, M. B. Toloczko, S. M. Bruemmer, S. N. Lvov, E. Chalkova, V. Balashov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A hydrothermal deposition process was explored as a route to deposit a ZrO2 coating for the mitigation of IGSCC in the BWR environment. Since it would be greatly advantageous to conduct deposition at a plant without defueling, a thin resistive coating (say <30 μm) that is still capable of conferring a low ECP would be much more desirable than a thicker one, in order to avoid potentially negative impact on heat transfer. However, only thick coatings (> ~40 μm) were capable of conferring low values of ECP; thin coatings (< ~5 μm) were not. Thinner coatings are more likely to contain defects that allow the environment access to the underlying metal. At the same time, a crack growth-rate test conducted in high-temperature water with 30 ppb sulfate addition, under both NWC and HWC, on a sensitized 304 SS specimen deposited with a thin coating of ZrO2 showed near-identical response to an uncoated specimen.

Original languageEnglish (US)
Title of host publication14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Pages470-495
Number of pages26
StatePublished - Dec 1 2009
Event14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 - Virginia Beach, VA, United States
Duration: Aug 23 2009Aug 27 2009

Publication series

Name14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Volume1

Other

Other14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
CountryUnited States
CityVirginia Beach, VA
Period8/23/098/27/09

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Environmental Engineering

Cite this

Chou, P. H., Pathania, R., Toloczko, M. B., Bruemmer, S. M., Lvov, S. N., Chalkova, E., & Balashov, V. (2009). Evaluation of hydrothermally-deposited zirconium oxide coatings to mitigate intergranular stress corrosion cracking in BWR environments. In 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 (pp. 470-495). (14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009; Vol. 1).