Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
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Galvanic Corrosion Behavior of Copper Canister

  • Minsoo Lee (Korea Atomic Energy Research Institute) ;
  • Junhyuk Jang (Korea Atomic Energy Research Institute) ;
  • Jin Seop Kim (Korea Atomic Energy Research Institute)
  • Received : 2023.12.14
  • Accepted : 2024.01.08
  • Published : 2024.03.30
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Abstract

In this study, we investigated the suppression of the corrosion of cast iron in a copper-cast iron double-layered canister under local corrosion of the copper layer. The cold spray coating technique was used to insert metals with lower galvanic activity than that of copper, such as silver, nickel, and titanium, between the copper and cast iron layers. Electrochemically accelerated corrosion tests were performed on the galvanic specimens in KURT groundwater at a voltage of 1.0 V for a week. The results revealed that copper corrosion was evident in all galvanic specimens of Cu-Ag, Cu-Ni, and Cu-Ti. By contrast, the copper was barely corroded in the Cu-Fe specimens. Therefore, it was concluded that if an inactive galvanic metal is applied to the areas where local corrosion is concerned, such as welding parts, the disposal canister can overcome local or non-uniform corrosion of the copper canister for long periods.

Keywords

Acknowledgement

This research was supported by the Institute for Korea Spent Nuclear Fuel (iKSNF) and National Research Foundation of Korea (NRF) grant (2021M2E1A1085193), and the Nuclear Research and Development Program of the National Research Foundation of Korea (NRF) (2021M2E3A2041351) funded by the Korean government (Ministry of Science and ICT, MSIT).

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