INTERACTION OF CHROME COATING WITH CLADDING MADE OF EP823-Sh STEEL IN THE TEMPERATURE RANGE 420–650 °C
https://doi.org/10.26583/vestnik.2024.354
EDN: TPOLQW
Abstract
Chromium coating can increase the corrosion resistance of a fuel rod cladding made of EP823-Sh steel in a liquid lead environment at temperatures up to 650 °C. It is advisable to block the diffusion interaction of the chromium coating and steel during the entire period of operation of the fuel rod. Studies of samples after high-temperature tests showed the presence of a coating-steel interaction layer. At a temperature of 420 °C and a holding time of 1000 hours, the coating retained adhesion, and no interaction between the coating and steel was observed. When tested at 540 °C and 650 °C and a holding time of 1000 hours, an interaction layer of uneven thickness within the range of 150-600 nm appears at the coating-steel interface. This layer has a complex composition and blocks further mutual diffusion of the steel components and coating into each other. EP823-Sh steel contains molybdenum and tungsten about 1 wt.% and they accelerate coating-steel interactions. An analysis of the interaction in the coating-steel system revealed the promise of using chromium as a protective coating for the inner surface of the fuel rod cladding made of EP823-Sh steel.
About the Authors
R. Sh. Isayev
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
P. S. Dzhumaev
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
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For citations:
Isayev R.Sh., Dzhumaev P.S. INTERACTION OF CHROME COATING WITH CLADDING MADE OF EP823-Sh STEEL IN THE TEMPERATURE RANGE 420–650 °C. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2024;13(4):273-281. (In Russ.) https://doi.org/10.26583/vestnik.2024.354. EDN: TPOLQW
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