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A kind of aluminum alloy anodized film sealing agent, preparation method and sealing method

An anodic oxide film and sealing agent technology, applied in the field of aluminum alloy, can solve the problems of harming human health, shortening the service life of aluminum devices, and more nickel and fluorine, so as to improve the sealing quality and reduce the effect of color fading.

Active Publication Date: 2022-01-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface treatment of aluminum alloy is mainly anodized, but the anodized film layer has a porous structure and has strong chemical activity. If the holes are not sealed or the sealing quality is poor, the pollutants in the environment will be absorbed by the micropores and deeply Corrosion will eventually lead to a reduction in the service life of aluminum devices, that is to say, the sealing quality of the aluminum alloy anodized film directly determines the corrosion resistance of the aluminum alloy, and the aluminum alloy generally needs dyeing treatment after anodic oxidation to obtain a good appearance effect If the quality of sealing holes cannot be guaranteed, it will also seriously affect the appearance and shape of the aluminum alloy.
At present, Ni is usually used at home and abroad 2+ and F - Ni-F sealing agent is the basic component, but the Ni-F sealing system consumes too much nickel and fluorine and is harmful to human health; the existing nickel-free sealing agent is difficult to meet the quality requirements of production. cannot be applied on a large scale

Method used

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  • A kind of aluminum alloy anodized film sealing agent, preparation method and sealing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare aluminum alloy anodized film sealing agent according to the component listed in table 1;

[0026] Preparation of aluminum alloy anodized film sealing agent: Sodium molybdate, sodium tripolyphosphate, potassium iodide, lanthanum chloride, silane coupling agent and sodium dodecylbenzenesulfonate are dissolved in water to form an aluminum alloy anodized film for sealing Agent A1. The content of described sodium molybdate is 2g / L, and the content of sodium tripolyphosphate is 0.5g / L, and the content of potassium iodide is 5g / L, and the content of lanthanum chloride is 0.04g / L, and gamma-(2,3- The content of glycidyloxy) propyltrimethoxysilane is 0.5g / L, and the content of sodium dodecylbenzenesulfonate is 0.05g / L;

[0027] Aluminum alloy aluminum alloy anodized film sealing: put the aluminum alloy that has been anodized and dyed into the aluminum alloy anodized film sealing agent prepared in Example 1 for sealing treatment, and the temperature of the sealing treatm...

Embodiment 2

[0029] Prepare aluminum alloy anodized film sealing agent according to the component listed in table 1;

[0030] Preparation of aluminum alloy anodized film sealing agent: Sodium molybdate, sodium tripolyphosphate, potassium iodide, lanthanum chloride, silane coupling agent and sodium dodecylbenzenesulfonate are dissolved in water to form an aluminum alloy anodized film for sealing Agent A2. The content of described sodium molybdate is 3g / L, and the content of sodium tripolyphosphate is 0.4g / L, and the content of potassium iodide is 8g / L, and the content of lanthanum chloride is 0.2g / L, and gamma-(2,3- The content of glycidyloxy) propyltrimethoxysilane is 0.2g / L, and the content of sodium dodecylbenzenesulfonate is 0.06g / L;

[0031] The aluminum alloy was sealed according to the method of Example 1 to obtain the sealed aluminum alloy part B2.

Embodiment 3

[0033] Prepare aluminum alloy anodized film sealing agent according to the component listed in table 1;

[0034] Preparation of aluminum alloy anodized film sealing agent: Sodium molybdate, sodium tripolyphosphate, potassium iodide, lanthanum chloride, silane coupling agent and sodium dodecylbenzenesulfonate are dissolved in water to form an aluminum alloy anodized film for sealing Agent A3. The content of described sodium molybdate is 1g / L, and the content of sodium tripolyphosphate is 0.6g / L, and the content of potassium iodide is 6g / L, and the content of lanthanum chloride is 0.5g / L, and gamma-(2,3- The content of glycidyloxy) propyltrimethoxysilane is 0.8g / L, and the content of sodium dodecylbenzenesulfonate is 0.03g / L;

[0035] The aluminum alloy was sealed according to the method of Example 1 to obtain the sealed aluminum alloy part B3.

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Abstract

An aluminum alloy anodized film sealing agent, a preparation method and a sealing method. The invention provides an aluminum alloy anodized film sealing agent, which comprises molybdate, phosphate, iodine compound, lanthanum compound, silane coupling agent and water. The present invention can effectively prevent or reduce the color fading of the dye after the dyeing treatment of the aluminum alloy anodic oxidation film through the combined use of molybdate, phosphate, iodine compound, lanthanum compound and silane coupling agent, and improve the anodic oxidation of aluminum alloy. The sealing quality of the membrane and the corrosion resistance of the product.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy anodized film sealing agent, a preparation method and a sealing method. Background technique [0002] Aluminum alloys have the advantages of light weight, strong corrosion resistance, and good thermal and electrical conductivity, and are widely used in aviation, aerospace, automobiles, machinery manufacturing, and civil industries. The surface treatment of aluminum alloy is mainly anodized, but the anodized film layer has a porous structure and has strong chemical activity. If the holes are not sealed or the sealing quality is poor, the pollutants in the environment will be absorbed by the micropores and deeply Corrosion will eventually lead to a reduction in the service life of aluminum devices, that is to say, the sealing quality of the aluminum alloy anodized film directly determines the corrosion resistance of the aluminum alloy, and the aluminum all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 韦家亮
Owner BYD CO LTD