Chemical polishing liquid used for metal and polishing technology

A technology of chemical polishing and polishing liquid, which is applied in the field of metal surface treatment, can solve the problems of high production cost, human environment hazards, and few applications, and achieve the effects of avoiding the release of harmful gases, being stable and not easy to decompose, and high polishing efficiency

Inactive Publication Date: 2016-06-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen oxide gas is very toxic and will cause serious harm to the human body and the environment
(2) Chromate series, this polishing method is due to high cost, high waste water treatment cost, and the presence of Cr 6+ Pollution problems, so it is less and less used in industrial production
(3) Hydrogen peroxide series, this method has problems such as the instability of hydrogen peroxide, the service life of the polishing agent is generally not long, and the production cost is relatively high.

Method used

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  • Chemical polishing liquid used for metal and polishing technology
  • Chemical polishing liquid used for metal and polishing technology
  • Chemical polishing liquid used for metal and polishing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, 304 stainless steel is used as the base material, and the following chemical polishing liquid and polishing method are used to carry out the surface treatment method on the stainless steel surface. The specific steps are as follows:

[0032] (1) Pretreatment degreasing and activation of the metal surface: the surface of the stainless steel sample formed by wire cutting is polished with sandpaper, rinsed with distilled water and dried; the sample is placed in an alkaline degreasing solution and soaked for 1 Minute oil removal, the concentration of each component in the alkaline solution is sodium hydroxide 30g / L, trisodium phosphate 50g / L, sodium carbonate 20g / L, OP emulsifier 5mL / L, and then rinse with distilled water and use Rinse with ionized water and dry with a hair dryer. Then carry out pickling and activation treatment for 10 seconds, the activator is 10% sulfuric acid, then rinse with distilled water, rinse with deionized water, and then blow ...

Embodiment 2

[0037] In this embodiment, 304 stainless steel is used as the base material, and the following chemical polishing liquid and polishing method are used to carry out the surface treatment method on the stainless steel surface. The specific steps are as follows:

[0038] (1) Pretreatment degreasing and activation of the metal surface: the surface of the stainless steel sample formed by wire cutting is polished with sandpaper, rinsed with distilled water and dried; the sample is placed in an alkaline degreasing solution and soaked for 1 Minute oil removal, the concentration of each component in the alkaline solution is sodium hydroxide 30g / L, trisodium phosphate 50g / L, sodium carbonate 20g / L, OP emulsifier 5mL / L, and then rinse with distilled water and use Rinse with ionized water and dry with a hair dryer. Then carry out pickling and activation treatment for 10 seconds, the activator is 10% sulfuric acid, then rinse with distilled water, rinse with deionized water, and then blow ...

Embodiment 3

[0043] In this embodiment, 304 stainless steel is used as the base material, and the following chemical polishing liquid and polishing method are used to carry out the surface treatment method on the stainless steel surface. The specific steps are as follows:

[0044] (1) Pretreatment degreasing and activation of the metal surface are exactly the same as in Examples 1 and 2. After degreasing and activating, rinse with distilled water, rinse with deionized water, and then dry with a hair dryer.

[0045](2) Place the sample in a chemical polishing solution and immerse it at 80°C for 3 minutes. During the chemical polishing process, the solution is stirred at a stirring rate of 300r / min, then rinsed with distilled water, then rinsed with deionized water, and then rinsed with Hairdryer to dry. The preparation of the polishing solution is as follows: prepare 100mL chemical polishing solution, in which the various components and concentrations in the polishing solution are as follow...

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Abstract

The invention belongs to the technical field of metal surface treatment and discloses chemical polishing liquid used for metal and a polishing technology. The polishing liquid includes 60 g / L-90 g / L of nitrate, 60 g / L-90 g / L of hydrochloric acid, 120 ml / L-180 ml / L of medium-strong acid, 20 g / L-50 g / L of a viscosity modifier, 1 g / L-10 g / L of a corrosion inhibitor, 2 g / L-6 g / L of a brightening agent and water. The polishing technology includes the steps that a metal workpiece is subjected to degreasing and activating pretreatment, the obtained metal workpiece is placed in the polishing liquid to be soaked for 2.5 min-4 min at the temperature ranging from 60 DEG C to 100 DEG C for being polished, after polishing is completed, the metal workpiece is subjected to neutralization aftertreatment, and therefore a flat and smooth metal surface can be obtained. The chemical polishing liquid is safe, environment-friendly, high in polishing efficiency, low in cost and suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a chemical polishing liquid and a polishing process for metal. Background technique [0002] Alloys such as stainless steel, brass, and aluminum alloys are widely used in decorative finishing products, machine parts, and tool products. Before the processing of these parts, such as spraying and coating, and the formation of the final product, it is necessary to carry out surface treatment on the surface of the metal to improve the surface roughness and brightness or to meet some other special properties. At present, the main surface treatment technologies mainly include three categories: electrochemical polishing, chemical polishing and mechanical polishing. Compared with the other two, chemical polishing is widely used for its advantages of low cost, simple operation and uniform polishing effect, especially for the surface treatment of parts with comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/00C23F3/06
CPCC23F3/00C23F3/06
Inventor 曾德长徐静余红雅郑志刚洪源王刚匡同春
Owner SOUTH CHINA UNIV OF TECH
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