Aluminum alloyanode oxide film hole sealing agent and hole sealing method thereof

An anodized film and sealing agent technology, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve problems such as unfavorable dye fixation, color difference, escape, etc., to achieve good sealing effect and dye escape. The effect of less output and small chromatic aberration change

Active Publication Date: 2019-06-21
安徽华淮新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing patent document CN106400085A discloses a sealing agent for post-treatment of aluminum and aluminum alloy anodic oxidation film, which uses silicate as the main salt, which is not conducive to dye fixation. Dye will escape from the oxide film, resulting in color difference, mottling and other defects

Method used

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  • Aluminum alloyanode oxide film hole sealing agent and hole sealing method thereof
  • Aluminum alloyanode oxide film hole sealing agent and hole sealing method thereof
  • Aluminum alloyanode oxide film hole sealing agent and hole sealing method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] The sealing agent that present embodiment provides is composed as follows:

[0045]

[0046] The obtained sealing agent has high stability and strong impurity tolerance, and the solution is continuously kept at 90-95°C for 10 days without precipitation.

[0047] The process conditions used in the sealing step: pH value 5.2-5.7 (adjusted with acetic acid or ammonia water), temperature 90-95°C, sealing speed 1-2min / μm, film thickness 10μm, sealing time 20min.

[0048] There is no sealing dust and watermark on the surface of the aluminum alloy anodic oxidation film, and the weight loss test of phosphorus-chromic acid shows that the weight loss of the oxide film is 19.2mg / dm 2 , There is no decolorization phenomenon on the surface of the dyed anodized film, the color fixing ability is strong, and the color is uniform; the neutral salt spray test is carried out according to the ASTM B-117 standard for 72 hours, and the surface has no corrosion.

[0049] When the sealing ...

Embodiment 2

[0051] The sealing agent that present embodiment provides is composed as follows:

[0052]

[0053]

[0054] The obtained sealing agent has high stability and strong tolerance to impurities. The solution was continuously incubated at 85-90°C for 10 days without precipitation.

[0055] The process conditions used in the sealing step: pH value 5.2-5.7 (adjusted with acetic acid or ammonia water), temperature 85-90°C, sealing speed 1-2min / μm, film thickness 7μm, sealing time 15min.

[0056] There is no sealing dust and watermark on the surface of the aluminum alloy anodic oxidation film, and the weight loss test of phosphorus-chromic acid shows that the weight loss of the oxide film is 23.9mg / dm 2 , There is no dye escape on the surface of the dyed anodized film, the color fixing performance is good, and the color

[0057] Uniform without markings. According to the standard of ASTM B-117, the neutral salt spray test was carried out for 72 hours, and there was no corrosio...

Embodiment 3

[0060] The sealing agent that present embodiment provides is composed as follows:

[0061]

[0062] The obtained sealing agent has high stability, and the solution is continuously kept at 85-90° C. for 10 days without precipitation.

[0063] The process conditions used in the sealing step: pH value 5.2-5.7 (adjusted with acetic acid or ammonia water), temperature 85-90°C, sealing speed 1-2min / μm, film thickness 12μm, sealing time 25min.

[0064] There is no sealing dust and watermark on the surface of aluminum alloy anodic oxidation film, and the weight loss test of phosphorus-chromic acid shows that the weight loss of the oxide film is 18.2mg / dm 2 , There is no decolorization phenomenon on the surface of the dyed anodized film, no dye escape, and good color fixing performance. According to the standard of ASTM B-117, the neutral salt spray test was carried out for 72 hours, and there was no corrosion on the surface.

[0065] When the sealing agent is used to dye the anodiz...

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PUM

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Abstract

The invention provides an aluminum alloy anode oxide film hole sealing agent and a hole sealing method thereof. The aluminum alloy anode oxide film hole sealing agent is prepared from the components with the following concentration: 5-10 g/L of nickelous acetate, 2-8 g/L of a PH stabilizer, 0.5-5 g/L of a corrosion inhibitor, 0.1-5 g/L of a surface active agent, 10-50 mg/L of an antisludging agent, 0.2-0.8 g/L of a complexing agent, and the balance of deionized water. The aluminum alloy anode oxide film hole sealing agent has the beneficial effects that 1, the hole sealing effect is great, escaped dye is less, the color difference change is small, and the aluminum alloy anode oxide film hole sealing agent can be used for dyeing anode oxide film sealing holes; 2, a hole sealing agent solution is stable, the impurity tolerance ability is strong, it is only needed that the content of the nickelous acetate is analyzed everyday, medicinal liquid is added according to the proportion, and thePH value of the solution is monitored periodically; 3, the anode oxide film is strong is corrosion resistance after being subjected to hole sealing, and a neutral salt spray test is conducted for 72hours according to the ASTM B-117 standard, and corrosion is avoided on the surface; and 4, the hole sealing effect meets the requirement of GB14952.1-94, and hole sealing ash is avoided on the surface of the oxide film.

Description

technical field [0001] The invention relates to a sealing agent for aluminum alloy anodic oxidation film and a sealing method thereof, belonging to the technical field of aluminum alloy anodic oxidation. Background technique [0002] Aluminum and aluminum alloys are the most widely used metal materials among non-ferrous metals. They have excellent comprehensive performance and can meet the different requirements for aluminum and aluminum alloy materials in industries such as architectural decoration, cosmetics, and electronic information. However, the hardness, wear resistance and corrosion resistance of aluminum and aluminum alloys are insufficient in use, and these properties can be improved by anodizing, thereby expanding the scope of use of aluminum alloys. Put aluminum or aluminum alloy in the electrolyte for anodic oxidation, and form a layer of porous oxide film on the surface. At this time, the corrosion resistance and dirt resistance of the oxide film are poor, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24C25D11/16C25D11/08
Inventor 熊伟孙道明
Owner 安徽华淮新材料有限公司
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