An antioxidant coating and its manufacturing method
By setting a gradient distribution of pure Cr coating on the surface of the zirconium alloy substrate, the problem of insufficient bonding strength of zirconium alloy fuel rod cladding under high temperature and high pressure water corrosion environment is solved, achieving high wear resistance and long service life of the coating and improving the safety of nuclear power facilities.
CN121161233BActive Publication Date: 2026-05-26SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD
- Filing Date
- 2025-11-21
- Publication Date
- 2026-05-26
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Figure CN121161233B_ABST
Abstract
An anti-oxidation coating and its manufacturing method are disclosed, belonging to the field of coatings. The anti-oxidation coating is applied to the surface of a zirconium alloy substrate. The coating is a pure Cr coating with a gradient hardness distribution along its thickness. The surface layer has a higher hardness than the underlying layer; the hardness of the underlying layer is >4 GPa, the hardness at half the thickness is >5 GPa, and the surface layer is >6 GPa. This anti-oxidation coating exhibits good bonding strength with the zirconium alloy substrate, and cracks are less likely to initiate at the bonding interface during long-term service under high temperature and high pressure corrosion environments, effectively improving the service life and reliability of the zirconium alloy substrate.
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