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Nitric acid-free yellow fume-free aluminum alloy chemical polishing liquid and preparation method thereof

A chemical polishing and no yellow smoke technology, which is applied in the field of surface treatment of aluminum and aluminum alloys, can solve problems such as application limitations, yellow smoke pollution of the environment, and the impact of phosphoric acid, and achieve the effects of wide application range, good polishing effect, and short polishing time

Inactive Publication Date: 2017-06-13
合肥华清金属表面处理有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During traditional tri-acid polishing, since the polishing solution contains a large amount of nitric acid, a large amount of yellow smoke (ie, nitrogen oxides) will be produced during the polishing process, seriously polluting the environment and endangering people's health; at the same time, phosphoric acid also has a certain impact on the environment. Eutrophication
Since the smoke-free chemical polishing process cannot meet the brightness and production requirements of traditional three-acid polishing, this greatly limits its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of nitric acid-free aluminum alloy chemical polishing liquid without yellow smoke, the content of each component in the chemical polishing liquid is as follows: citric acid 35mL / L, sulfonic acid 10mL / L, glacial acetic acid 38mL / L, brightener 30mL / L , sodium molybdate 2.5g / L, sodium tungstate 2g / L, 2-mercapto-1-methylimidazole 0.5g / L, the balance of water.

[0030] The mass percent of each component in the brightener is: sodium polydithiodipropane sulfonate 10%, coconut oil fatty acid diethanolamide 12.5%, sodium benzoate 6.5%, nicotinic acid 2%, and the rest is water.

[0031] Above-mentioned a kind of non-nitric acid-free aluminum alloy chemical polishing liquid without yellow smoke comprises the following steps:

[0032] (1) According to the composition of raw materials, sodium polydithiodipropane sulfonate, coconut oil fatty acid diethanolamide, sodium benzoate, nicotinic acid, etc. are dissolved in water, and fully stirred to prepare brightener A;

[0033] (...

Embodiment 2

[0043] A kind of nitric acid-free aluminum alloy chemical polishing solution without yellow smoke, the content of each component in the chemical polishing solution is as follows: citric acid 45mL / L, sulfonic acid 25mL / L, glacial acetic acid 55mL / L, brightener 50mL / L , sodium molybdate 7g / L, sodium tungstate 4.5g / L, 2-mercapto-1-methylimidazole 0.5g / L, the balance of water.

[0044] The mass percent of each component in the brightener is: sodium polydithiodipropane sulfonate 10%, coconut oil fatty acid diethanolamide 12.5%, sodium benzoate 6.5%, nicotinic acid 2%, and the rest is water.

[0045] The preparation method of the aforementioned nitric acid-free, yellow-smoke-free aluminum alloy chemical polishing solution is the same as in Example 1.

[0046] Example 2:

[0047] A kind of nitric acid-free aluminum alloy chemical polishing solution without yellow smoke, the content of each component in the chemical polishing solution is as follows: citric acid 45mL / L, sulfonic acid ...

Embodiment 3

[0054] A kind of nitric acid-free aluminum alloy chemical polishing solution without yellow smoke, the content of each component in the chemical polishing solution is as follows: citric acid 55mL / L, sulfonic acid 35mL / L, glacial acetic acid 65mL / L, brightener 50mL / L , sodium molybdate 7g / L, sodium tungstate 4.5g / L, 2-mercapto-1-methylimidazole 0.5g / L, the balance of water.

[0055] The mass percent of each component in the brightener is: sodium polydithiodipropane sulfonate 10%, coconut oil fatty acid diethanolamide 12.5%, sodium benzoate 6.5%, nicotinic acid 2%, and the rest is water.

[0056] The preparation method of the aforementioned nitric acid-free, yellow-smoke-free aluminum alloy chemical polishing solution is the same as in Example 1.

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PUM

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Abstract

The invention discloses a nitric acid-free yellow fume-free aluminum alloy chemical polishing liquid and a preparation method thereof. The nitric acid-free yellow fume-free aluminum alloy chemical polishing liquid contains, by mass, 40 to 50 mL / L of citric acid, 15 to 30 mL / L of sulfonic acid, 45 to 65 mL / L of glacial acetic acid, 40 to 55 mL / L of a brightener, 5 to 10 g / L of a molybdate, 3 to 6 g / L of a tungstate, 1 to 3 g / L of 2-mercapto-1-methylimidazole and the balance of water. Compared with the traditional three-acid system, the aluminum alloy chemical polishing liquid has the characteristics of environmental friendliness, no yellow fume, good polishing effects, stable polishing rate, long work liquid service life and preparation convenience.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of aluminum and aluminum alloys, in particular to an aluminum alloy chemical polishing liquid which does not contain phosphoric acid and nitric acid and does not produce yellow smoke during the polishing process and a preparation method thereof. Background technique [0002] Aluminum and its alloys are a common metal material in our daily life, and there are various processing techniques for aluminum alloy materials. Also because of the important application of aluminum in our daily life, aluminum products are required to have different surface effects, such as soft sand surface or bright mirror effect, and polishing is an important means to obtain a bright mirror surface. [0003] The polishing of aluminum and its alloys generally adopts three techniques: mechanical polishing, chemical polishing and electrolytic polishing. Among them, chemical polishing is the chemical etching of metal...

Claims

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Application Information

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IPC IPC(8): C23F3/03
CPCC23F3/03
Inventor 刘万青何园郑松林崔亚茹
Owner 合肥华清金属表面处理有限责任公司
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