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Stripping solution of titanium carbide and/or titanium nitride film and stripping method

A stripping solution and titanium carbide technology, applied in the direction of chemical instruments and methods, surface etching compositions, etc., to achieve effective stripping effect

Inactive Publication Date: 2014-02-12
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no solution and method that can stably and effectively remove titanium carbide and / or titanium nitride film layers without damaging the substrate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Prepare stripping solution

[0019] Take 500ml of deionized water, add 50ml of sulfuric acid with a weight concentration of 98% to the deionized water, then add 5g of thiourea, stir until the thiourea is completely dissolved, add 200ml of hydrofluoric acid solution with a concentration of 40% by weight and 50ml The weight percent concentration is 80% triethanolamine, and finally make up deionized water to make the solution volume 1000ml to obtain the eliminator. In this stripping liquid, the concentration of sulfuric acid is 90.16g / L, the concentration of hydrofluoric acid is 90.4g / L, and the concentration of triethanolamine is 40.8g / L.

[0020] 2. Removal of titanium carbide and / or titanium nitride film

[0021] Several samples with titanium carbide and / or titanium nitride film layers formed on the surface of the stainless steel substrate are taken, and the thickness of the titanium carbide and / or titanium nitride film layer is about 2 μm. The sample is completely...

Embodiment 2

[0023] 1. Prepare stripping solution

[0024] Get 500ml of deionized water, add 55ml of sulfuric acid with a weight concentration of 98% to the deionized water, then add 5g of thiourea, stir until the thiourea is completely dissolved, add 175ml of hydrofluoric acid solution with a concentration of 40% by weight and 55ml Concentration by weight is 80% triethanolamine solution, and deionized water is added at last to make the solution volume be 1000ml to obtain the stripping solution. In this stripping liquid, the concentration of sulfuric acid is 99.18g / L, the concentration of hydrofluoric acid is 79.11g / L, and the concentration of triethanolamine is 44.88g / L.

[0025] 2. Remove the film layer

[0026] Take several samples with titanium carbide and / or titanium nitride film layer formed on the surface of the stainless steel substrate, the thickness of the titanium carbide and / or titanium nitride film layer is about 1.5 μm. The sample is completely immersed in the stripping sol...

Embodiment 3

[0028] 1. Prepare stripping solution

[0029] Take 500ml of deionized water with a temperature of about 50°C, dissolve 400g of ammonium bifluoride and 5g of thiourea in deionized water, then add 400ml of acetic acid solution with a concentration of 36% by weight and 20ml of a solution of triethanolamine with a concentration of 80% by weight , and then add deionized water to make the volume of the solution to 1000ml to obtain the eliminator. In this stripping liquid, the concentration of acetic acid is 145g / L, and the concentration of triethanolamine is 16.32g / L.

[0030] 2. Remove the film layer

[0031] Several samples with titanium carbide and / or titanium nitride film layers formed on the surface of the stainless steel substrate are taken, and the thickness of the titanium carbide and / or titanium nitride film layer is about 2 μm. The sample is completely immersed in the stripping solution prepared above at room temperature for 2 hours to strip the titanium carbide and / or t...

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PUM

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Abstract

A solution and method for removing titanium-containing coatings from the surface of substrates using the solution are provided. The solution includes 90-1000 g / L organic or inorganic acid; 70-500 g / L accelerant, the accelerant being acid or salt which contains fluorinion; 15-200 g / L secondary accelerator, the secondary accelerator being generic amino alcohols which can combine with titanium ion; 2-8 g / L inhibiter, the inhibiter being selected from one or more of the group consisting of thiourea, thiourea derivatives, and carbamide. The method for removing titanium-containing coating on the substrate mainly includes contacting the substrate with the titanium-containing coating with the solution.

Description

technical field [0001] The invention relates to a solution for removing titanium carbide and / or titanium nitride film layers on the surface of a substrate and a method for removing titanium carbide and / or titanium nitride film layers using the 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, so the coating needs to be removed and re-coated; (2) in production , the plated 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. [0003] Titan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K13/06
CPCC23G1/086
Inventor 黄巍宫红丽
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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