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| Study on Electropolishing of Hastelloy C-276 Alloy |
WANG Yi1, WANG Pan1, SUO Hongli1, JIA Qiang1, LU Dongqi1,
LI Huaizhou2, WU Haiming1
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1 Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124;
2 The Capital Aerospace Machinery Company, Beijing 100076; |
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Abstract The environmental friendly polishing liquid was used to polish the surface of Hastelloy C-276 alloy substrate, which was used for the technical route of ion beam assisted deposition (IBAD).The typical curve of anodic polarization was obtained, and the mechanism of electrochemical polishing was described. The effect of electrochemical polishing elements (such as electrolytic polishing temperature, polishing time and polishing distance) on the roughness of substrate′s surface was investigated. The high quality surface with the roughness lower than 5 nm (in the area of 5 μm×5 μm) was obtained via the optimized polishing processes, which satisfied to the requirements of surface roughness for the subsequent deposition by IBAD. Citric acid in polishing liquid decomposed into a complexing agent at about 50 ℃, which could accelerate the precipitation of metal ions and increase the reactivity of surface.
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Published: 25 January 2017
Online: 2018-05-02
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2017, Vol. 31 
