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Wang, Dong; Zhong, Ruhao; Zhang, Yapei; Chen, Peng; Yu, Jian; Lan, Yicong; Su, G.H.; Qiu, Suizheng; Tian, Wenxi; Liao, Yehong; Peng, Zhenxun
Corrosion science, 07/2023, Letnik: 218Journal Article
The isothermal oxidation behavior of magnetron-sputtered Cr-coated Zr-1Nb alloy cladding in 1000–1300 ℃ steam environment is studied. The phenomena at each temperature are summarized and the oxidation kinetics are discussed. Cr coating can maintain the oxidation resistance for more than 6 h at 1000 ℃ and 1100 ℃ under double-sided oxidation condition, while suffered degradation during long-duration oxidation at 1200 ℃ and 1300 ℃. After coating degradation, Zr substrate was oxidized prior to residual metallic Cr and the metallic Cr was not completely oxidized until the ZrO2 layer beneath the coating had grown to a certain thickness. Mainly due to the redox reaction between Zr and Cr2O3 and the preferential oxidation of Zr substrate, the thickness of Cr2O3 film decreased after a certain oxidation duration. The Cr coating after degradation at 1200 ℃ can still hinder the oxidation of Zr substrate to a certain extent, while that at 1300 ℃ almost lost the protective effect. •Isothermal steam oxidation of Cr-coated Zr alloy was performed in temperature range of 1000–1300 ℃.•Oxidation kinetics of Cr-coated Zr alloy cladding was summarized.•Oxidation behavior of Zr substrate after coating degradation were discussed.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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