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Stripping solution and method for stripping titanium carbide film layer by electrolysis

A technology for electrolytic stripping and stripping solution, applied in the field of electrolytic stripping of titanium carbide film, can solve the problems of high energy consumption, long time required, corrosion of the base material, etc., and achieve the effect of low energy consumption

Inactive Publication Date: 2011-11-09
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the application of large current for a long time in this method, the possibility of the substrate being corroded is greatly increased, and the energy consumption is large, and the time required is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare the first stripping solution and the second stripping solution of the stripping solution respectively. The first stripping solution is composed of 5g / L sodium hydroxide, 10g / L ethylenediaminetetraacetic acid (EDTA) and the rest of water. The second stripping solution is composed of 150g / L sodium hydroxide, 20g / L sodium tartrate, 33g / L triethanolamine and the rest of water.

[0031] Perform the first step of electrolysis. The first stripping solution was heated to 60° C., and the sample with a titanium carbide film layer formed on the surface of the stainless steel substrate with a thickness of about 2 μm was immersed in the first stripping solution, and the titanium carbide film layer was formed with the sample The stainless steel substrate is used as the anode, and the carbon plate is used as the cathode, with 4A / dm 2 The electric current density electrolyzes for 4 minutes, makes this titanium carbide film layer partly dissolve.

[0032] The sample after the...

Embodiment 2

[0035] Embodiment 2 is the same as Embodiment 1 except that the deplating solution is different, and other steps and conditions are the same. The first stripping solution of the stripping solution of embodiment 2 is made up of the sodium hydroxide of 20g / L, the ethylenediaminetetraacetic acid (EDTA) of 20g / L and the water of surplus; The second stripping solution is made up of 75g / L L of sodium hydroxide, 20g / L of sodium citrate, 28.6g / L of triethanolamine and the rest of water.

Embodiment 3

[0037] Prepare the first stripping solution and the second stripping solution of the stripping solution respectively. The first stripping solution is composed of 10g / L potassium hydroxide, 10g / L sodium gluconate and the rest of water. The second stripping solution is composed of 100g / L potassium hydroxide, 10g / L sodium tartrate, 5g / L sodium gluconate, 16.3g / L triethanolamine and the rest of water.

[0038] Perform the first step of electrolysis. The first deplating solution was heated to 65°C, and the sample with a titanium carbide film layer formed on the surface of the stainless steel substrate with a thickness of about 2 μm was immersed in the first deplating solution, and the titanium carbide film layer was formed with the sample The stainless steel substrate is used as the anode, and the carbon plate is used as the cathode, with 3A / dm 2 The electric current density electrolyzes for 5 minutes, makes this titanium carbide film layer partly dissolve.

[0039] The sample a...

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PUM

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Abstract

The invention provides a stripping solution which is used for stripping a titanium carbide film layer by a two-step electrolytic method, and the stripping solution comprises a first stripping solution and a second stripping solution; the first stripping solution comprises 2-80 g / L of soluble alkali metal hydroxides and 5-100 g / L of aqueous solutions of complexing agents which have complexation effect with titanium ions; the second stripping solution comprises 50-300 g / L of soluble alkali metal hydroxides, 5-100 g / L of complexing agents which have complexation effect with titanium ions, and 10-60 g / L of aqueous solutions of alcohol amine compounds which have complexation with the titanium ion. The compexing agents in the first stripping solution and the second stripping solution do not contain the alcohol amine compounds. The invention also provides a method for stripping a titanium carbide film layer by electrolysis by using the stripping solution.

Description

technical field [0001] The invention relates to a stripping solution for electrolytically stripping a titanium carbide film layer on the surface of a base material and a method for electrolytically stripping a titanium carbide film layer by using the stripping solution. Background technique [0002] Coating technology has a wide range of applications in the industrial field. However, it is usually necessary to remove the coating in the following two situations: (1) after long-term use, the coating on the surface of the workpiece has been damaged or seriously aged, and the coating needs to be removed and re-coated; (2) in production, The coated coating does not meet the quality requirements. In order to reduce losses and save costs, it is necessary to remove the coating and let the workpiece be reworked and re-coated. Therefore, how to completely remove the coating from the surface of the substrate without damaging the substrate is an important issue in industrial production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F5/00
CPCC25F3/02
Inventor 黄巍司国春
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD