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Chemical polishing liquid and polishing method

A technology of chemical polishing and brightener, applied in the direction of chemical instruments and methods, polishing compositions, etc., can solve the problems of endangering human health and polluting the environment, and achieve the effects of reducing pollution, high brightness, and smooth surface

Inactive Publication Date: 2010-10-06
深圳市新合富力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the chemical polishing process of the nitric acid-hydrochloric acid system in the existing alloy chemical polishing liquid will produce toxic and harmful gases such as "yellow smoke", pollute the environment and endanger human health, thereby providing a kind of Polishing solutions that produce "yellow smoke"
[0006] The technical problem to be solved by the present invention is that the chemical polishing process of the nitric acid-hydrochloric acid system in the existing alloy chemical polishing liquid will produce toxic and harmful gases such as "yellow smoke", pollute the environment and endanger human health, thereby providing a kind of Polishing methods that produce "yellow smoke"

Method used

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  • Chemical polishing liquid and polishing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Prepare chemical polishing fluid according to the following components:

[0030] Sulfuric acid 50ml / L, hydrogen peroxide 150ml / L, acetic acid 150ml / L, phosphoric acid 80ml / L, thiourea 2g / L, benzotriazole 1g / L, acetanilide 150ml / L, add water to 1 liter, the measured pH is 2.1.

[0031] 2. Pretreatment process

[0032] Product inspection: measure the size of the copper-zinc alloy workpiece and mark it accordingly.

[0033] Top piece: Fix the copper-zinc alloy workpiece on the hanger for use.

[0034] Degreasing and degreasing: The copper-zinc alloy workpiece (size before polishing: 19.00mm×6.25mm×1.325mm) is sequentially subjected to all-purpose degreasing (10% all-purpose degreasing agent, treatment for 1min), electrolytic degreasing (60g / L degreasing agent, 45°C, treatment for 30s), acid degreasing (20% acid degreasing agent + 3% phosphoric acid, treatment for 1min), after treatment to remove the grease and dirt on the surface.

[0035] Triple water washing: Put ...

Embodiment 2

[0048] 1. Prepare chemical polishing fluid according to the following components:

[0049] Sulfuric acid 15ml / L, hydrogen peroxide 180ml / L, acetic acid 200ml / L, tripolyphosphoric acid 80ml / L, zinc dihydrogen phosphate 2g / L, nonylphenol polyoxyethylene ether 3g / L, glycerol 200ml / L, imidazole 20ml / L, sodium oxalate 80ml / L, add water to 1 liter, the measured pH is 1.9.

[0050] 2. After pretreatment, immerse the copper-zinc alloy sample in the polishing solution at room temperature (25°C) for 3 minutes, shake the copper-zinc alloy slightly, take out the sample and immerse it in dilute sulfuric acid solution for 10 seconds, rinse with water after acidification to remove the film, Dry to obtain mirror polished effect samples.

[0051]The specific technological process of the chemical polishing experiment is the same as that in Example 1, and the size of the copper-zinc alloy workpiece before polishing is 18.89mm×6.17mm×1.318mm.

Embodiment 3

[0053] 1. Prepare chemical polishing fluid according to the following components:

[0054] Sulfuric acid 70ml / L, hydrogen peroxide 200ml / L, acetic acid 150ml / L, citric acid 60ml / L, coumarin 2g / L, sulfonamide 2g / L, polyoxyethylene fatty amine 100ml / L, benzotriazole 15ml / L , lignosulfonic acid 50ml / L, add water to 1 liter, the recorded pH is 1.9.

[0055] 2. After pretreatment, immerse the copper-zinc alloy sample in the polishing solution at room temperature (25°C) for 3 minutes, shake the copper-zinc alloy slightly, take out the sample and immerse it in dilute sulfuric acid solution for 10 seconds, rinse with water after acidification to remove the film, Dry to obtain mirror polished effect samples.

[0056] The specific technological process of the chemical polishing experiment is the same as in Example 1, and the size of the copper-zinc alloy workpiece is the standard workpiece size of 18.97mm×6.25mm×1.328mm.

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Abstract

The invention provides chemical polishing liquid, comprising sulfuric acid, hydrogen peroxide, acetic acid, an auxiliary oxidant, a brightening agent and an adjusting agent, and the PH of the polishing liquid is 1-3. The polishing liquid has simple components and easy control, the obtained chemical polishing surface has high brightness and smooth surface, and can achieve the mirror polishing effect. The polishing liquid can be widely applied in polishing of the surface of copper-zinc alloy.

Description

technical field [0001] The invention relates to a chemical polishing liquid and a polishing method thereof, in particular to a copper-zinc alloy chemical polishing liquid and a polishing method thereof. Background technique [0002] Alloys, such as copper-zinc alloys and stainless steel, are widely used in the manufacture of precision products such as electronic product parts. In the later stages of parts production, processes such as electroplating, welding, and packaging are often required. However, the surface of the alloy is prone to grease adhesion during the early manufacturing process, and the surface of the alloy will also be oxidized to form a relatively dense oxide film, which will directly affect the yield of the subsequent production of the alloy. Perform surface treatment to remove surface grease and oxide film and improve the surface smoothness and brightness of the material to ensure the final yield of the product. [0003] Among the existing polishing techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/14
Inventor 丁培陈云徐恩平吴留森周珍别
Owner 深圳市新合富力科技有限公司
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