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Method for removing scaling of surface of titanium anode for electrolytic copper foil

A technology for electrolytic copper foil and titanium anode, applied in electrolytic process, electrolytic components, electroforming and other directions, can solve the problems of corrosion of titanium substrate and precious metal coating, waste of scaling removal efficiency, harsh operating environment, etc. The effect of mild and low energy consumption

Active Publication Date: 2014-10-29
GUANGZHOU HONWAY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating environment of this method is harsh, the waste of acid and alkali is serious, and the scale removal efficiency is low. At the same time, strong acid and strong alkali will also corrode the titanium substrate and the precious metal coating, causing great damage and waste to the anode.

Method used

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  • Method for removing scaling of surface of titanium anode for electrolytic copper foil
  • Method for removing scaling of surface of titanium anode for electrolytic copper foil

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Put the scale-covered titanium anode plate in a mixed solution of 25% sodium chloride and 5% calcium chloride by mass fraction, soak it at 80°C for 2.0h, take it out and scrub it with a brush or plastic brush until the scale cannot be removed. Then place the anode plate in Na with a mass concentration of 10% 2 SO 3 After soaking in the solution for 1 hour at 60°C, take it out and scrub it with a brush or plastic brush. Finally, place the anode plate in a mixed solution of triammonium citrate with a mass concentration of 10% and fatty alcohol polyoxyethylene ether with a mass concentration of 0.5%, soak it at 70°C for 1 hour, take it out and scrub it with a brush or plastic brush At this time, the scaling is basically completely removed.

Embodiment 2

[0038] Put the scale-covered titanium anode plate in a mixed solution of 28% sodium chloride and 4% calcium chloride by mass fraction, soak it at 70°C for 2.5 hours, take it out and scrub it with a brush or plastic brush until the scale cannot be removed. Then place the anode plate in 10% Na 2 In S solution, soak at 70°C for 1 hour, take it out and scrub it with a hair brush or plastic brush. Finally, put the anode plate in a mixed solution of 8% sodium citrate and 0.8% fatty alcohol polyoxyethylene ether, soak it at 80°C for 1 hour, take it out and scrub it with a brush or plastic brush, and the scaling is basically complete at this time Remove cleanly.

Embodiment 3

[0040] Put the scale-covered titanium anode plate in a mixed solution of 24% sodium chloride and 6% calcium chloride by mass fraction, soak it at 90°C for 1.5h, take it out and scrub it with a brush or plastic brush until the scale cannot be removed. Then place the anode plate in 8% Na 2 SO 3 with Na 2 In the composition solution of S, soak it at 50°C for 1.5h, take it out and scrub it with a hair brush or plastic brush. Finally, place the anode plate in a mixed solution of 12% sodium citrate and 0.3% fatty alcohol polyoxyethylene ether, soak it at 60°C for 1.5 hours, take it out and scrub it with a hair brush or plastic brush. Removes completely.

[0041] figure 1 It is the oxygen evolution polarization curve of the unused anode before and after soaking in the three-step solution, which is used to compare the influence of the cleaning solution on the electrochemical activity of the coating. figure 2 It is the relationship curve of the change of cell voltage at differen...

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Abstract

The invention discloses a method for removing scaling of the surface of a titanium anode for an electrolytic copper foil. The method comprises the following steps: 1) placing the titanium anode covered with scaling in a mixed solution of sodium chloride and calcium chloride, fully soaking, so as to make the scaling become loose, and then brushing away the loose scaling; 2) placing the titanium anode treated by the step 1) in a reducing agent solution, fully soaking, and cleanly brushing and cleaning with a brush; and 3) placing the titanium anode treated by the step 2) in a mixed solution of a complexing agent and a penetrating agent, fully soaking, and then cleanly brushing and cleaning with the brush. The method has the advantages of low energy consumption, low cost, simple operation and mild conditions, can effectively remove the scaling on the surface of the titanium anode for the electrolytic copper foil, cannot damage a precious metal coating layer on the surface of the anode, and can effectively prolong the service life of the anode in an electrolytic copper foil production.

Description

Technical field [0001] The present invention involves a method of removing electrolytic copper foil on the surface of titanium anode. Background technique [0002] In the production of electrolytic copper foil, due to the high anode current density (6000A / m 2 ~ 10000 A / M 2 ), The response conditions are relatively harsh. Generally, precious metal oxide anode (mainly oxygen -based titanium -based IRO 2 +TA 2 O 5 The anode of the system) as anode.During the electrolytic process, a small amount of PB in the electrolyte 2+ Continuously oxidize on the anode surface to PB 4+ And PBO 2 The form is precipitated, attached to the anode surface; when the power outage, the PBO on the anode surface 2 It was restored to PBSO again 4 The precipitation is attached to the surface of the anode, causing the anode surface to gradually be PBO 2 , PBSO 4 Cover and adhere to form a dense layer of scaling layer, resulting in increased groove pressure and increased power consumption.Moreover, the scaling...

Claims

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Application Information

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IPC IPC(8): C25C7/06C25D1/04
Inventor 徐海清赵国鹏胡耀红陈力格甘振杰钟洪胜徐金来
Owner GUANGZHOU HONWAY TECH CORP
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