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Polishing liquid of aluminum product and polishing method of polishing liquid

A technology of aluminum products and polishing liquid, which is applied in the field of polishing of metal products, can solve problems such as endangering the health of operators, environmental pollution, and no yellow smoke chemical polishing process restrictions, and achieve the goals of reducing gas pollution, avoiding over-corrosion, and good polishing effect Effect

Inactive Publication Date: 2017-12-19
徐州轩辕铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional chemical polishing process generally adopts the "three-acid" process of phosphoric acid, sulfuric acid, and nitric acid, which has the advantages of good polishing quality and high brightness. However, due to the use of nitric acid, a large amount of yellow smoke (that is, nitrogen oxides) is generated during the polishing process. Cause serious environmental pollution and greatly endanger the health of operators
[0003] Domestic research on chemical polishing of aluminum products without yellow smoke probably began in the 1980s, and some results have been achieved. However, in general, the polishing brightness (reflectivity) of non-yellow smoke polishing is not enough, and it cannot reach the level of traditional three-acid polishing. Brightness and Production Requirements
Therefore, the application of the no-yellow-smoke chemical polishing process is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polishing solution for aluminum products, made from the following raw materials in parts by weight: 45 parts of phosphoric acid, 75 parts of sulfuric acid, 1.8 parts of aluminum sulfate, 0.15 parts of ammonium persulfate, 0.12 parts of sodium silicate, 0.18 parts of thiourea, dithiourea 0.35 parts of dipropanol, 0.16 parts of ethylenediamine tetramethylene phosphonic acid, and 0.06 parts of oleyl hydroxyethyl imidazoline.

[0021] Wherein, the mass ratio concentration of the phosphoric acid is 85%. The mass ratio concentration of the sulfuric acid is 98%.

[0022] The polishing steps are as follows:

[0023] S1: Prepare chemical polishing liquid according to the formula;

[0024] S2: heating the polishing solution to 75°C-110°C;

[0025] S3: Dip the dry and clean aluminum product to be polished into the polishing solution in step S2 for 20S-150S;

[0026] S4: Take out the aluminum product in step S3 and wash it with deionized water at 50° C. for two to three times...

Embodiment 2

[0029] A polishing solution for aluminum products, made from the following raw materials in parts by weight: 30 parts of phosphoric acid, 85 parts of sulfuric acid, 0.2 part of aluminum phosphate, 0.05 part of ammonium persulfate, 0.04 part of sodium silicate, 0.01 part of thiourea, dithiourea 0.05 part of dipropanol, 0.02 part of ethylenediamine tetramethylene phosphonic acid, and 0.01 part of oleyl hydroxyethyl imidazoline.

[0030] Wherein, the mass ratio concentration of the phosphoric acid is 85%. The mass ratio concentration of the sulfuric acid is 98%.

[0031] The polishing steps are as follows:

[0032] S1: Prepare chemical polishing liquid according to the formula;

[0033] S2: heating the polishing solution to 75°C-110°C;

[0034] S3: Dip the dry and clean aluminum product to be polished into the polishing solution in step S2 for 20S-150S;

[0035] S4: Take out the aluminum product in step S3 and wash it with deionized water at 50° C. for two to three times;

...

Embodiment 3

[0038] A polishing solution for aluminum products, made of the following raw materials in parts by weight: 65 parts of phosphoric acid, 55 parts of sulfuric acid, 2.5 parts of aluminum hydroxide, 0.2 parts of ammonium persulfate, 0.18 parts of sodium silicate, 0.3 parts of thiourea, disulfide 0.5 part of dipropanol, 0.2 part of ethylenediamine tetramethylene phosphonic acid, and 0.1 part of oleyl hydroxyethyl imidazoline.

[0039] Wherein, the mass ratio concentration of the phosphoric acid is 85%. The mass ratio concentration of the sulfuric acid is 98%.

[0040] The polishing steps are as follows:

[0041] S1: Prepare chemical polishing liquid according to the formula;

[0042] S2: heating the polishing solution to 75°C-110°C;

[0043] S3: Dip the dry and clean aluminum product to be polished into the polishing solution in step S2 for 20S-150S;

[0044] S4: Take out the aluminum product in step S3 and wash it with deionized water at 50° C. for two to three times;

[004...

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PUM

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Abstract

The invention discloses a polishing liquid of an aluminum product. The polishing liquid is made of raw materials, the raw materials comprise, by weight, 30-65 parts of phosphoric acid, 55-85 parts of sulfuric acid, 0.2-2.5 parts of aluminum salt, 0.05-0.2 part of ammonium persulfate, 0.04-0.18 part of sodium silicate, 0.01-0.3 part of thiourea, 0.05-0.5 part of dithio-propylene glycol, 0.02-0.2 part of ethylenediamine tetramethylenephosphonic acid and 0.01-0.1 part of oleyl hydroxyethyl imidazoline. The polishing steps comprises of preparing the polishing liquid, heating the polishing liquid to 75-110 DEG C, immersing the dry and clean aluminum product to be polished in the polishing liquid, soaking for 20-150 S, washing the taken-out aluminum product by using deionized water of 50 DEG C, and blow drying. The polishing liquid adopts synergetic matching of phosphoric acid, sulfuric acid, aluminum ion, a strong oxidizing agent, a corrosion inhibitor and a brightener, the problem of over etching of aluminum materials can be effectively avoided, the polishing effect is good, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of polishing of metal products, and in particular relates to a polishing liquid for aluminum products and a polishing method thereof. Background technique [0002] Chemical polishing of aluminum products is a chemical processing method that uses the selective self-dissolution of aluminum and aluminum alloys in acidic or alkaline electrolyte solutions to reduce their surface roughness and pH. Chemical polishing has the advantages of low energy consumption, simple operation, high production efficiency, and is not limited by product shape and size. It is an extremely important process in the surface finishing treatment of aluminum products. The traditional chemical polishing process generally adopts the "three-acid" process of phosphoric acid, sulfuric acid, and nitric acid, which has the advantages of good polishing quality and high brightness. However, due to the use of nitric acid, a large amount of yellow s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03
CPCC23F3/03
Inventor 魏道金
Owner 徐州轩辕铝业有限公司