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Electrochemical polishing method of nickel-tungsten alloy base-band for coated conductor

A technology for coating conductors and nickel-tungsten alloys, which is applied in the field of electrochemical polishing of Ni-5at.%W alloy base strips for coating conductors, can solve the problem of inability to determine the composition and proportion of metal or alloy polishing liquids, and achieves technical The conditions and operation methods are simple, the performance is stable, and the process is stable.

Inactive Publication Date: 2010-03-03
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is still impossible to determine the most suitable polishing liquid composition and ratio for a certain metal or alloy in theory, but only through experiments and repeated comparisons to find a suitable polishing liquid
At present, there is no relevant report on the electrochemical polishing of Ni-5at.%W alloy base strip for coated conductors. There is only a patent about the polishing process of nickel-based strips for coated conductors: "Electrochemical Polishing Method for Coated Superconductor Nickel-based Strips" , Chinese Patent Application No. 200410083618.5, the surface roughness of the nickel base strip after electrochemical polishing is about ten nanometers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the annealed Ni-5at.%W alloy substrate, cut it into short samples (10mm×40mm), ultrasonically clean it in acetone for 10min to remove oil, then ultrasonically clean it with deionized water for 10min, then dehydrate it with alcohol and blow dry stand-by. Sulfuric acid (mass concentration 98%), water and glycerol are fully stirred according to the volume ratio of 65-75:75-85:2-3 to prepare an electrochemical polishing solution and place it in a beaker. Assemble the polishing equipment: 1. Use the stainless steel substrate (40mm×40mm) as the cathode, and connect it to the DC stabilized voltage and stabilized current power supply through wires. 2. The Ni-5at.% W alloy base strip is used as the anode, which is connected to the anode of the DC stabilized current power supply through wires. 3. In the test, double cathodes were used to polish the anode, the cathode and anode pieces were immersed in the polishing solution in parallel, and the polishing pole distance was 30...

Embodiment 2

[0022] Take the annealed Ni-5at.%W alloy substrate, cut it into short samples (10mm×40mm), ultrasonically clean it in acetone for 10min to remove oil, then ultrasonically clean it with deionized water for 10min, then dehydrate it with alcohol and blow dry stand-by. Sulfuric acid (mass concentration 98%), water and glycerol are fully stirred according to the volume ratio of 65-75:75-85:2-3 to prepare an electrochemical polishing liquid and place it in a beaker. Assemble the polishing equipment: 1. Use the stainless steel substrate (40mm×40mm) as the cathode, and connect it to the power supply through wires. 2. The Ni-5at.% W alloy base strip is used as the anode, which is connected to the anode of the power supply through wires. 3. In the test, double cathodes are used to polish the anode, the cathode and anode pieces are immersed in the polishing solution in parallel, and the polishing pole distance is 30mm, forming a complete electrochemical polishing system. Connect the DC...

Embodiment 3

[0025] Take the annealed Ni-5at.%W alloy substrate, cut it into short samples (10mm×40mm), ultrasonically clean it in acetone for 10min to remove oil, then ultrasonically clean it with deionized water for 10min, then dehydrate it with alcohol and blow dry stand-by. Sulfuric acid (mass concentration 98%), water and glycerol are fully stirred according to the volume ratio of 65-75:75-85:2-3 to prepare an electrochemical polishing liquid and place it in a beaker. Assemble the polishing equipment: 1. Use the stainless steel substrate (40mm×40mm) as the cathode, and connect it to the power supply through wires. 2. The Ni-5at.% W alloy base strip is used as the anode, which is connected to the anode of the power supply through wires. 3. In the test, double cathodes are used to polish the anode, the cathode and anode pieces are immersed in the polishing solution in parallel, and the polishing pole distance is 35mm, forming a complete electrochemical polishing system. Connect the DC...

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Abstract

The invention discloses an electrochemical polishing method of a nickel-tungsten alloy base-band for a coated conductor. The method comprises the following steps: preparing an electrochemical polishing solution by utilizing sulphuric acid, water and propanetriol according to a certain volume ratio; taking an Ni-5at.%W base-band as an anode, taking stainless steel as a cathode, submerging the anodeand the cathode in the electrochemical polishing solution, switching on a power supply, and polishing under the voltage of 5 to 8 V and the current density of 1 to 1.3A*cm<2>, wherein the temperatureof the polishing solution is kept between 0 DEG C and the room temperature, time is controlled between 30 to 60 s, and polishing polar distance is controlled between 30 to 40 mm; and repeatedly washing and drying the base-band by alcohol and deionized water. The invention has the advantages of stable component of the polishing solution, stable polishing effect and low cost. The method can effectively reduce the roughness of the surface of the base-band on the basis of maintaining the original texture sharpness of the base-band, and is applicable to the scale polishing treatment of the Ni-5at.% base-band.

Description

technical field [0001] The invention belongs to the technical field of electrochemical surface treatment, and in particular relates to an electrochemical polishing method for a Ni-5at.%W alloy base strip for a coated conductor. Background technique [0002] YBCO coated conductors (also known as second-generation high-temperature superconducting tapes) have attracted widespread attention because of their excellent current-carrying and magnetic flux pinning capabilities, and have become a research and development hotspot in the field of high-temperature superconducting materials in recent years. The coated conductor consists of alloy base strip, buffer layer, superconducting layer and protective layer. Among the layers, the main function of the baseband is to provide support and texture template, which largely determines the final performance of the coated superconductor. Ni-5at.% W alloy is the first choice material for baseband preparation because of its high strength, low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/22
Inventor 王雪李成山冀勇斌郑会玲于泽铭纪平
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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