Method for removing anodic oxide film on surface of seven-series aluminum alloy and film removing agent

A technology for anodic oxide film and aluminum alloy surface, which is applied in the field of anodic oxide film release treatment method and film release agent on the surface of seven series aluminum alloys, and can solve the problems of high temperature, foggy surface of aluminum alloy, and long release treatment time. , to achieve the effect of long time and high temperature

Inactive Publication Date: 2020-04-17
广东东明新材科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acidic molybdate phosphate release agent developed by some researchers not only takes a long time and high temperature for the release treatment, but also affects the high-gloss surface of the seven-series aluminum alloy substrate, because the phosphate formed after the release treatment The protective film will penetrate into the surface of the substrate, and after anodizing treatment, it will obviously show dense bright pits on the high-gloss surface
However, when the traditional alkaline stripper removes the oxide film on the surface of the seven-series aluminum alloy, under the same treatment conditions, the part with a slightly thicker oxide film will not be completely removed, and the part with a slightly thinner oxide film will appear surface corrosion, and It will severely corrode the high-gloss surface of the seven-series aluminum alloy and cause the surface of the aluminum alloy to appear foggy; and the traditional alkaline release agent has a large amount of erosion on the surface of the substrate, which cannot meet the air tightness test requirements of the enterprise's production requirements for size

Method used

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  • Method for removing anodic oxide film on surface of seven-series aluminum alloy and film removing agent
  • Method for removing anodic oxide film on surface of seven-series aluminum alloy and film removing agent
  • Method for removing anodic oxide film on surface of seven-series aluminum alloy and film removing agent

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Embodiment approach

[0051] For an implementation, see figure 1 , a method for removing an anodized film on the surface of a seven-series aluminum alloy, comprising the steps of:

[0052] S110, putting the seven-series aluminum alloy base material into a degreasing agent, and performing degreasing and degreasing treatment.

[0053] In order to better remove the dirt on the surface of the seven-series aluminum alloy substrate after anodic oxidation treatment, for example, in one embodiment, the degreasing agent includes the following components in parts by mass: 10 to 30 parts of sodium carbonate, ethylene di 10-30 parts of disodium amine tetraacetate, 10-30 parts of sodium gluconate, 1-5 parts of alkyl glycoside and 0.5-2 parts of fatty alcohol polyoxyethylene ether.

[0054] It can be understood that the alkalinity of sodium carbonate and sodium gluconate is weak, and disodium edetate is weakly acidic. The combination of the three can obtain a neutral degreasing agent. The cleaning effect of ox...

Embodiment 1

[0075] S111, stirring 10 g of sodium carbonate, 10 g of disodium edetate, 10 g of sodium gluconate, 1 g of alkyl glucoside, 0.5 g of fatty alcohol polyoxyethylene ether, and 1 L of water to obtain a degreasing agent; The base material was put into the degreasing agent, and degreasing and degreasing treatment was performed at a temperature of 55° C. for 3 minutes.

[0076] S121, sodium hydroxide 20g, potassium hydroxide 20g, triethanolamine 500g, sodium silicate 5g, sodium metaaluminate 5g, gelatin 5g, sodium gluconate 10g, sodium citrate 10g, edetate disodium 10g, Trisodium nitrilotriacetate 10g, ethylene thiourea 2g, thiourea 2g, hydroxyethylidene diphosphonic acid 5g and 1L water were stirred, and the pH value was adjusted to 13 to obtain a release agent; the seven-series aluminum alloy substrate put into the release agent, and carry out a release treatment to remove the anodized film on the surface of the seven-series aluminum alloy substrate.

[0077] S131, stir 10 g of s...

Embodiment 2

[0080] S112, stirring 30g of sodium carbonate, 30g of disodium edetate, 30g of sodium gluconate, 5g of alkyl glycoside, 2g of fatty alcohol polyoxyethylene ether and 1L of water to obtain a degreasing agent; Put the material into the degreasing agent, and perform degreasing and degreasing treatment at a temperature of 70° C. for 1 min.

[0081] S122, 30g of sodium hydroxide, 5g of rubidium hydroxide, 5g of cesium hydroxide, 300g of diethanolamine, 300g of triethanolamine, 10g of sodium metaaluminate, 20g of disodium edetate, 5g of thiourea, 2-mercaptobenzo 3g of imidazole and 1L of water were stirred, and the pH value was adjusted to 14 to obtain a release agent; the seven-series aluminum alloy base material was put into the release agent, and a release treatment was performed to remove the Anodized film on the surface of aluminum alloy substrate.

[0082] S132, stirring 50 g of sulfuric acid, 50 g of oxidizing agent, 50 g of stain remover, and 1 L of water to obtain a neutra...

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Abstract

The invention relates to the technical field of aluminum alloy film-stripping treatment, in particular to a method for removing an anodic oxide film on the surface of a seven-series aluminum alloy anda film removing agent. According to the method for removing the anodic oxide film on the surface of the seven-series aluminum alloy, the anodic oxide film on the surface of the seven-series aluminumalloy substrate is removed through procedures such as degreasing and oil removal treatment, film removal treatment, neutralization and ash removal treatment and drying treatment. The film removing agent comprises the following components in parts by mass of 1-10 parts of inorganic base, 10-60 parts of organic base, 1-10 parts of corrosion inhibitor, 1-10 parts of complexing agent and 0.1-1 part ofbrightener. Compared with a traditional acidic film removing agent and a traditional alkaline film removing agent, the film removing agent has the advantages that the treatment temperature conditionis more mild, the film removing speed is higher, and the film removing treatment time is shorter; and moreover, the film removal treatment does not damage the high-light surface of the seven-series aluminum alloy substrate, does not corrode the surface of the seven-series aluminum alloy, and can meet the air tightness test requirements of enterprise production on the size requirement.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy stripping treatment, in particular to a stripping treatment method and a stripping agent for an anodic oxidation film on the surface of a seven-series aluminum alloy. Background technique [0002] At present, aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Among them, the seven-series aluminum alloy is widely used in aircraft parts, missile parts, truck ship parts and other devices that require strength. In recent years, it has been widely used in the 3C electronics industry. Most electronics companies choose Seven-series aluminum alloys are used as smart electronic components. [0003] Among them, anodizing treatment is an indispensable and important link in the pretreatment process of seven-series aluminum alloys. Therefore, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/36C23G1/22C23G1/16
CPCC23F1/36C23G1/16C23G1/22
Inventor 袁科孙洪泉刘梦臣叶献解况金权
Owner 广东东明新材科技有限公司
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