Comparative Study on Corrosion Resistance of TaSiCN, TaAlSiCN and TaCrSiCN Coatings in NaCl-KCl Molten Salt

Ning Zhien; Wu Lu; Zhang Wei; Fang Zhongqiang; Mao Jianjun; Kong Xianggang

doi:10.13832/j.jnpe.2023.S2.0193

Volume 44 Issue S2

Dec. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(S2): 193-200

Ning Zhien, Wu Lu, Zhang Wei, Fang Zhongqiang, Mao Jianjun, Kong Xianggang. Comparative Study on Corrosion Resistance of TaSiCN, TaAlSiCN and TaCrSiCN Coatings in NaCl-KCl Molten Salt[J]. Nuclear Power Engineering, 2023, 44(S2): 193-200. doi: 10.13832/j.jnpe.2023.S2.0193

Citation:

Ning Zhien, Wu Lu, Zhang Wei, Fang Zhongqiang, Mao Jianjun, Kong Xianggang. Comparative Study on Corrosion Resistance of TaSiCN, TaAlSiCN and TaCrSiCN Coatings in NaCl-KCl Molten Salt[J]. Nuclear Power Engineering, 2023, 44(S2): 193-200. doi: 10.13832/j.jnpe.2023.S2.0193

Citation:

Ning Zhien, Wu Lu, Zhang Wei, Fang Zhongqiang, Mao Jianjun, Kong Xianggang. Comparative Study on Corrosion Resistance of TaSiCN, TaAlSiCN and TaCrSiCN Coatings in NaCl-KCl Molten Salt[J]. Nuclear Power Engineering, 2023, 44(S2): 193-200. doi: 10.13832/j.jnpe.2023.S2.0193

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Comparative Study on Corrosion Resistance of TaSiCN, TaAlSiCN and TaCrSiCN Coatings in NaCl-KCl Molten Salt

doi: 10.13832/j.jnpe.2023.S2.0193

Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2023-08-28
Rev Recd Date: 2023-11-07
Publish Date: 2023-12-30

Abstract

Abstract

In order to explore the corrosion resistance of Al and Cr doped TaSiCN coatings in NaCl-KCl molten salt, nano-composite coatings of TaSiCN, TaAlSiCN and TaCrSiCN with approximately N atomic percent were prepared on Ta alloy substrate by using RF magnetron sputtering technology and adjusting the ratio of Ar and N₂ mixed gases. The microstructure, chemical composition and corrosion resistance of the coating in NaCl-KCl molten salt were systematically studied. The results show that all as-deposited coatings are composed of TaN, TaC and Ta(C,N) nanocrystals and amorphous carbon such as SiC_x, SiN_x, CN_x and sp2, among which the doped Al and Cr elements also exist in the coatings in amorphous form. After corrosion, the coating surface is mainly composed of crystalline components such as Ta(C,N), Ta₂O₅ and Na₂Ta₄O₁₁, and other amorphous components. The corrosion behavior of coating in NaCl-KCl molten salt is mainly oxidation corrosion, supplemented by molten salt corrosion. Through comparison, it is found that the order of corrosion resistance of three coatings is: TaAlSiCN > TaSiCN > TaCrSiCN. This study can provide a potential candidate coating material for the development of surface coating technology of molten salt electrolytic crucible.
- TaSiCN coating,
- Magnetron sputtering,
- Ta alloy,
- NaCl-KCl molten salt,
- Corrosion resistance

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References(25)

References

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