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Normal-temperature sealer for anodic oxide film of aluminum and aluminum alloy and sealing method thereof

An anodized film, anodizing technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., to achieve the effects of energy saving, strong anti-pollution ability, and smooth feel

Inactive Publication Date: 2010-03-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The second technical problem to be solved by the present invention is to overcome existing Ni 2+ -F - In order to improve the surface of aluminum alloy anodic oxide film, it provides a low-cost, simple preparation, easy operation, low water quality requirements, and good sealing effect for aluminum and aluminum alloy anodized film. Pollution resistance, corrosion resistance and electrical insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 5.82 grams of nickel sulfate, 1.06 grams of sodium fluoride, 0.37 grams of fluoboric acid, 0.005 grams of sodium dodecylsulfonate, 2.0 grams of triethanolamine, 0.5 grams of hexamethylenetetramine, and 0.5 grams of mannitol in 1 liter of water. 0.2g of organic phosphonate was prepared into an aqueous solution and stirred evenly. Adjust the pH value of the solution to 6.0 with acetic acid or ammonia water to obtain the blocking agent.

[0060] Pour the sealing agent into the sealing tank, and use a constant temperature bath to control the working temperature of the sealing agent to 20°C. Put the aluminum alloy anodic oxidation film workpiece processed by the conventional method into the sealing agent for 10 minutes, take it out, and carry out aging treatment in 60°C water for 15 minutes, and then dry to obtain the sealed aluminum alloy anodic oxidation film.

Embodiment 2

[0062] Ni is prepared by nickel acetate, sodium fluoride and fluoboric acid 2+ (0.8g / L)+F - (0.4g / L) nickel fluoride sealing agent, add 0.1g sodium dodecylsulfonate, 0.1g triethanolamine, 0.01g mannitol, adjust the pH value of the solution to 5.5-6.0 with fluoboric acid or sodium hydroxide aqueous solution That is, the sealing agent is obtained. Keep the temperature at 25°C, put the sample into a closed tank for sealing treatment; after 15 minutes, take the test piece out, wash it with deionized water, dry it with cold air, and then mature it in deionized water at 60°C-70°C for 5 minutes. Take out the test piece, wash it with deionized water, dry it with cold air and store it to complete the sealing treatment.

Embodiment 3

[0064] The aluminum alloy is degreased, cleaned, and anodized in 180g / L sulfuric acid bath at 20°C for 30 minutes to obtain an oxide film of 10-15μm. After washing with water, neutralize it in 2% sodium carbonate aqueous solution at room temperature for 2 minutes, and then Enter the room temperature sealing treatment of the present invention. Dissolve 2.3g of nickel carbonate in 0.68g of fluoboric acid, then add 0.001g of sodium dodecylsulfonate, 5.0g of triethanolamine, 1.0g of mannitol, 0.5g of aluminum sulfate, 0.45g of thiourea, and 0.05g of p-amino Phenol, stir until dissolved, dilute to 1 liter to prepare the required sealing agent, the temperature is controlled at 30°C, soak the anodized workpiece in the sealing agent for 10 minutes, and then perform aging treatment in water at 60°C for 10 minutes , cleaned and dried to obtain a sealed aluminum alloy anodized film.

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PUM

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Abstract

The invention provides a normal-temperature sealer for an anodic oxide film of aluminum and aluminum alloy. The sealer is characterized by comprising the following components in concentration (g / L): Ni<2+>0.8-1.3, F<-> 0.4-0.8, triethanolamine 0.1-5.0, hexamethylene tetramine 0.1-1.0, sodium dodecanesulphonate0.001-0.1, bloom inhibitor 0.01-2.0 and the balance of water. The invention also discloses a sealing method for the sealer. Compared with the prior art, the sealer has the advantages of low cost, easy preparation, easy operation, and great improvement on the surface anti-pollution ability, the anti-corrosion property and the electric insulativity of the anodic oxide film of the aluminum alloy.

Description

technical field [0001] The invention relates to the technical field of surface treatment of aluminum and aluminum alloys, in particular to a normal-temperature sealing agent for anodic oxidation films of aluminum and aluminum alloys and a related sealing method. The process can effectively seal the pores of anodic oxidation films of aluminum and aluminum alloys, effectively reducing the Porosity and adsorption of aluminum and aluminum alloy anodized film, improve its corrosion resistance, wear resistance and electrical insulation. Background technique [0002] Anodizing is the most commonly used surface treatment method for aluminum and aluminum alloys. After anodizing aluminum and aluminum alloys, an anodic oxide film with a controllable film thickness and porous structure is formed. It has high porosity and adsorption, and is easily polluted. When used in a corrosive environment, the corrosive medium is easy to enter the hole and cause corrosion. Therefore, in order to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18C25D11/24
Inventor 李保松乌学东倪浩明
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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