Aluminum alloy two-acid smokeless polishing additive and preparation method thereof

An additive, aluminum alloy technology, applied in the field of polishing

Active Publication Date: 2014-11-26
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it contains nitric acid, the polishing process will produce a large amount of toxic nitrogen oxide yellow smoke, which seriously pollutes the environment and endangers human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The ratio of phosphoric acid and pyrophosphoric acid in the aluminum alloy two-acid smokeless polishing additive solvent of the present invention is 1:1, and the specific components are as follows:

[0023] Sodium molybdate 3.0%

[0024] Iron Sulfate 3.0%

[0025] Copper Sulfate 1.0%

[0026] Niacin 0.1%

[0027] Polyether 0.1%

[0028] Solvent 92.8%

[0029] The mass ratio of phosphoric acid and sulfuric acid in the polishing solution is 1:1, add aluminum alloy two acids for smokeless polishing according to 5% of the total mass, and stir evenly. The six series of aluminum materials are polished, the polishing temperature is 100°C, the polishing time is 3 minutes, and the average gloss of the polished product is above 580 degrees.

[0030]

Embodiment 2

[0032] Six series of aluminum materials are polished. The ratio of phosphoric acid and pyrophosphoric acid in the aluminum alloy two-acid smokeless polishing additive solvent of the present invention is 4:1, and the specific components are as follows:

[0033] Sodium molybdate 12.0%

[0034] Iron Sulfate 10.0%

[0035] Copper Sulfate 3.0%

[0036] Niacin 0.2%

[0037] Polyether 0.1%

[0038] Solvent 74.7%

[0039] The mass ratio of phosphoric acid and sulfuric acid in the polishing solution is 1:1, add aluminum alloy two acid smokeless polishing additives according to 4% of the total mass, and stir evenly. The six series of aluminum materials are polished, the polishing temperature is 90°C, the polishing time is 3 minutes, and the average gloss of the polished product is above 680 degrees.

Embodiment 3

[0041] The ratio of phosphoric acid and pyrophosphoric acid in the aluminum alloy two-acid smokeless polishing additive solvent of the present invention is 2:1, and the specific components are as follows:

[0042] Sodium molybdate 10.0%

[0043] Iron Sulfate 5.0%

[0044] Copper Sulfate 1.0%

[0045] Niacin 0.3%

[0046] Polyether 0.2%

[0047] Solvent 83.5%

[0048] The mass ratio of phosphoric acid and sulfuric acid in the polishing solution is 1:1, add aluminum alloy two acid smokeless polishing additives according to 5% of the total mass, and stir evenly. The six series of aluminum materials are polished, the polishing temperature is 110°C, the polishing time is 2 minutes, and the average gloss of the polished product is above 650 degrees.

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Abstract

The invention discloses a novel aluminum alloy smokeless two-acid polishing additive and a preparation method thereof. According to the additive, a solution composed of phosphoric acid and pyrophosphoric acid in a certain mass ratio is used as a solvent, sodium molybdate is used as a corrosion inhibitor, copper sulfate and ferric sulfate are used as sensitizers, polyether is used as a dispersing agent, and nicotinic acid is used as a complexing agent. The preparation method comprises the following steps: adding certain amounts of sodium molybdate, copper sulfate, ferric sulfate, nicotinic acid and polyether into the phosphoric acid-pyrophosphoric acid mixture, and dissolving by heating and stirring. The additive does not generate oxynitride yellow smoke or other gaseous pollutants in the traditional three-acid polishing process, thereby preventing the polishing from damaging the human body and environment; and the polishing quality of the additive is comparable with that of the three-acid technique, and thus, the additive is a novel environment-friendly high-efficiency aluminum alloy two-acid polishing additive.

Description

Technical field: [0001] The invention relates to polishing, in particular to an additive for aluminum alloy two-acid smokeless polishing. technical background: [0002] The traditional chemical polishing of aluminum and aluminum alloys usually adopts the "three-acid" process, namely phosphoric acid, sulfuric acid and nitric acid. Since the nitric acid contained in the three-acid polishing solution is a strong oxidizing agent, it is difficult to reduce the aluminum in the polishing process. The strong metal decomposes so quickly that it is unimaginable. A large amount of yellow smoke overflows instantly like a fire, which is difficult to deal with in time. In addition, the fluctuation of the concentration of nitric acid will inevitably cause the surface of the polished aluminum alloy to alternate between light and dark, and the yield rate is low. If the nitric acid content is too low, you can see defects such as unsatisfactory brightness of the chemically polished aluminum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03
CPCC23F3/03
Inventor 李文飞张丹郭举杨帆杨丽萍解田
Owner WENGFU (GRP) CO LTD
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