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Phosphorus-free aluminum alloy polishing agent and its preparation method and aluminum alloy polishing method

A technology of aluminum alloy and polishing agent, applied in the field of polishing agent, can solve the problems of large loss of aluminum material, environmental pollution, nitrogen oxide generation, etc.

Active Publication Date: 2018-07-31
JIANGXI ZHONGYAN METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the phosphoric acid polishing agent is a strong acid solution, so the loss of aluminum after polishing is large, and a large amount of nitrogen oxides are produced during the polishing process, which pollutes the environment.
The polishing effect of non-phosphoric acid polishing agent on aluminum alloy is not as good as that of phosphoric acid polishing agent on aluminum alloy

Method used

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Examples

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Effect test

preparation example Construction

[0018] The present invention also provides a preparation method of a phosphorus-free aluminum alloy polishing agent, the preparation method comprising:

[0019] a. Mix sodium alkylbenzene sulfonate, polyethylene glycol rosin acid, diethanolamide laurate and water, heat to 50-70°C and keep warm to prepare the first mixed liquid;

[0020] b. Add triethanolamine, methylcellulose and fluorescent whitening agent to the first mixed solution, mix and heat to 80-100°C and keep warm to prepare the second mixed solution;

[0021] c. Cool the second mixed solution to 15-35° C., and then add nitric acid to prepare a phosphorus-free aluminum alloy polishing agent.

[0022] In the preparation method of the phosphorus-free aluminum alloy polishing agent provided by the present invention, the amount of each raw material can be selected within a wide range, but in order to make the aluminum alloy treated with the phosphorus-free aluminum alloy polishing agent have more excellent glossiness, P...

Embodiment 1

[0031] a. Mix 1.5 g of sodium dodecylbenzene sulfonate, 15 g of polyethylene glycol abietic acid, 12 g of octyllauric acid diethanolamide and 1400 g of water, heat to 60° C. and keep it warm for 13 minutes to prepare the first mixed solution;

[0032] b. Add 7g of triethanolamine, 0.2g of methylcellulose and 4.5g of fluorescent whitening agent to the first mixed solution, mix and heat to 90°C and keep it warm for 8 minutes to prepare the second mixed solution;

[0033] c. Cool the second mixed solution to 25° C., and then add 100 g of nitric acid to prepare a phosphorus-free aluminum alloy polishing agent.

[0034] d. At 25° C., soak the aluminum alloy sheet in the above-mentioned phosphorus-free aluminum alloy polishing agent for 2.5 minutes to prepare polished aluminum alloy A1.

[0035] Table 1 shows the glossiness of the polished aluminum alloy and the detection results of whether nitrogen oxides are produced during the polishing process.

Embodiment 2

[0037] a. Mix 1 g of sodium dodecylbenzene sulfonate, 13 g of polyethylene glycol abietic acid, 10 g of octyllauric acid diethanolamide and 1300 g of water, heat to 50°C and keep it warm for 10 minutes to prepare the first mixed solution;

[0038] b. Add 5 g of triethanolamine, 0.2 g of methylcellulose and 4 g of fluorescent whitening agent into the first mixed liquid, mix and heat to 80° C. and keep it warm for 5 minutes to prepare the second mixed liquid;

[0039] c. Cool the second mixed solution to 15° C., and then add 100 g of nitric acid to prepare a phosphorus-free aluminum alloy polishing agent.

[0040] d. At 15° C., soak the aluminum alloy sheet in the above-mentioned phosphorus-free aluminum alloy polishing agent for 2 minutes to prepare polished aluminum alloy A2.

[0041]Table 1 shows the glossiness of the polished aluminum alloy and the detection results of whether nitrogen oxides are produced during the polishing process.

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Abstract

The invention discloses a phosphorus-free aluminum alloy polishing agent, a preparation method thereof and an aluminum alloy polishing method. The phosphorus-free aluminum alloy polishing agent contains nitric acid, triethanolamine, sodium alkyl benzene sulfonate, rosin-polyethylene glycol ester, lauric diethanolamide, methylcellulose, a fluorescent brightener and water, wherein relative to 100 parts of nitric acid, all other components are taken in parts by weight as follows: 5-9 parts of triethanolamine, 1-2 parts of sodium alkyl benzene sulfonate, 13-18 parts of rosin-polyethylene glycol ester, 10-13 parts of lauric diethanolamide, 0.2-0.3 part of methylcellulose, 4-5 parts of the fluorescent brightener and 1300-1500 parts of the water. No harmful gases are discharged in the process that aluminum alloy is polished by using the phosphorus-free aluminum alloy polishing agent; and the polished aluminum alloy has excellent glossiness.

Description

technical field [0001] The invention relates to a polishing agent, in particular to a phosphorus-free aluminum alloy polishing agent, a preparation method thereof, and an aluminum alloy polishing method. Background technique [0002] At present, there are two main types of chemical polishing agents for aluminum alloys: acidic solutions and alkaline solutions. Alkaline polishing agent is a strong alkaline solution, its main component is sodium hydroxide, the operating temperature is high, usually above 100°C, the alkali fog is severe during polishing, affecting the operating environment, it is severely corroded to aluminum, the metal loss is serious, and the light output speed It is slow, and requires more concentrated acid for post-treatment to remove the black film left after alkali washing, improve the surface brightness, and more processes. [0003] Acidic polishing agents mainly include phosphoric acid polishing agents and non-phosphoric acid polishing agents. Phosphori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F3/03
Inventor 张建军史沸涛
Owner JIANGXI ZHONGYAN METAL TECH CO LTD
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