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Electrochemical polishing device and method for electrode foil and metallographic phase thereof

A polishing device, electrochemical technology, applied in the direction of electrolysis components, electrolysis process, etc., can solve the problems of inability to meet the test ability of large-scale electrode foil samples, large consumption of electrochemical polishing liquid, and low surface quality of electrode foil, etc., to prevent The effect of temperature influence, ensuring polishing treatment, and speeding up drying efficiency

Pending Publication Date: 2020-10-09
SICHUAN ZHONGYA TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the polishing of electrode foil is purely manual, which is inefficient and can only polish one sample at a time, which cannot meet the ability to test a large number of electrode foil samples.
[0004] In addition, the traditional electropolishing method consumes a lot of electrochemical polishing fluid, and the surface quality of the polished electrode foil is not high

Method used

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  • Electrochemical polishing device and method for electrode foil and metallographic phase thereof
  • Electrochemical polishing device and method for electrode foil and metallographic phase thereof
  • Electrochemical polishing device and method for electrode foil and metallographic phase thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Pore corrosion: Conduct porosity corrosion in a mixed acid solution of hydrochloric acid and oxalic acid for 19 seconds to obtain 25 porosity-corroded foils.

[0041] (2) Hole expansion corrosion: The hole expansion corrosion was carried out in nitric acid solution for 113s, and 25 sheets of hole expansion corrosion foils were obtained.

[0042] (3) Electrolytically polish the above 25 hole-expanding corrosion foils in the electrode foil and its metallographic electrochemical polishing device, with a voltage of 25V and a temperature of 30°C, and then take pictures with a scanning electron microscope SEM. The microscopic appearance of this sample is as follows image 3 shown.

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this ...

Embodiment 2

[0046] As shown, the present invention provides an electrode foil and its metallographic electrochemical polishing device. Compared with Embodiment 1, it also includes: a gas stirring device, and the gas stirring device includes: a compressed air injection device, an air intake pipe, The sidewall below of the pressure vessel 8 is provided with an air inlet 3, and the top of the pressure vessel 8 is provided with an air outlet, and the air injection port of the compressed air injection device is connected with the air inlet 3 through an air inlet pipe, so A one-way valve is installed on the air inlet 3, and the one-way valve controls gas to enter the pressure vessel 8 in one direction.

[0047] All the other structures are the same as in Example 1.

Embodiment 3

[0049] As shown, the present invention provides an electrode foil and its metallographic electrochemical polishing device. Compared with Embodiment 1, it also includes: a polishing liquid cooling device, and the polishing liquid cooling device includes: a cooling coil 2, the The cooling coil 2 is installed inside the pressure vessel 8, and the two ends of the cooling coil 2 pass through the pressure vessel and are connected to the outside world. The cooling coil 2 can be fed with cooling liquid to cool the polishing solution. deal with.

[0050] All the other structures are the same as in Example 1.

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Abstract

The invention provides an electrochemical polishing device for an electrode foil and a metallographic phase thereof. The electrochemical polishing device comprises a pressure container, a positive electrode and a negative electrode, wherein an openable sealing end cover is mounted at the top of the pressure container; an electrode foil fixing device is mounted in the pressure container; the electrode foil fixing device is connected with the positive electrode and is suspended and fixed; the electrochemical polishing device further comprises an electrochemical polishing solution circulating device, a washing device and a drying device; the electrochemical polishing solution circulating device is connected with the pressure container; the electrochemical polishing solution circulating devicecan be used for injecting an electrochemical polishing solution into the pressure container and recycling the electrochemical polishing solution; the washing device can be used for washing the innerwall of the pressure container, the electrode foil and the metallographic phase thereof after electrochemical polishing; the drying device is used for drying the electrode foil or the metallographic phase thereof through a heating coiled pipe and an exhausting system; and a sample obtained by carrying out the electrochemical polishing on the electrode foil and the metallographic phase thereof by utilizing the device can be directly observed by utilizing a scanning electron microscope or a metallographic microscope, so that a sample preparation flow is simplified.

Description

technical field [0001] The invention relates to the field of electrode foil surface polishing, in particular to an electrode foil and its metallographic electrochemical polishing device and method. Background technique [0002] Electrode foil is the core material of aluminum electrolytic capacitors. Like batteries, aluminum electrolytic capacitors have two pole pieces, positive and negative, so there are two kinds of electrode foils, anode and cathode. Among them, the cathode electrode foil uses corrosion foil; the anode electrode foil uses chemical foil. High-purity aluminum foil is processed into a corroded foil with micron or nanopore structure on the surface through multiple electrochemical processes. The corroded foil is then formed into a chemical foil with a uniform aluminum oxide film on the surface through the electrochemical process of chemical formation. The microstructure of the aluminum oxide film is a key factor for the specific surface area of ​​the electrode...

Claims

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Application Information

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IPC IPC(8): C25F7/00C25F3/20
CPCC25F7/00C25F3/20
Inventor 陈健李英黄耀何桂丽
Owner SICHUAN ZHONGYA TECH