Chemical treatment method for aluminum alloy surface

A technology of aluminum alloy surface and chemical treatment, which is applied in the coating process of metal materials, etc., can solve the problems of toxic hexavalent chromium ions, human health hazards, environmental pollution, etc., and achieve excellent surface quality, stable process, and easy access to raw materials Effect

Inactive Publication Date: 2008-02-13
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: The present invention provides a chemical treatment method for the surface of aluminum alloys, the purpose of which is to solve the problem that toxic an

Method used

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  • Chemical treatment method for aluminum alloy surface
  • Chemical treatment method for aluminum alloy surface
  • Chemical treatment method for aluminum alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1:

[0035] Take 20×70×2mm LY12 aluminum alloy sample for use.

[0036] (1) Polishing. Sand with water-resistant sandpaper to 800 # .

[0037] (2) Chemical degreasing. First, prepare a chemical degreasing agent, the formula is as follows:

[0038] Component

[0039] OP-10 (emulsifier)

[0040] The components other than the above-mentioned deionized water are respectively dissolved in deionized water according to the formula ratio, mixed to prepare an aqueous solution, and put into a container for later use. The aluminum alloy sample to be processed was immersed in the above-mentioned aqueous solution, and the temperature of the solution was maintained at 55° C. for 5 minutes.

[0041] (3) Alkaline corrosion. The above-mentioned chemically degreasing aluminum alloy sample was immersed in 50g / L sodium hydroxide, and the temperature was maintained at 55°C for 6 minutes.

[0042] (4) Light out. The above-mentioned chemically degreasing aluminum allo...

Example Embodiment

[0049] Example 2:

[0050] Take 20×70×2mm LY12 aluminum alloy sample for use.

[0051] (1) Polishing. Sand with water-resistant sandpaper to 800 # .

[0052] (2) Chemical degreasing. First, prepare a chemical degreasing agent, the formula is as follows:

[0053] Component

[0054] The components other than the above-mentioned deionized water are respectively dissolved in deionized water according to the formula ratio, mixed to prepare an aqueous solution, and put into a container for later use. The aluminum alloy sample to be processed was immersed in the above-mentioned aqueous solution, and the temperature of the solution was maintained at 55° C. for 5 minutes.

[0055] (3) Alkaline corrosion. The above-mentioned chemically degreasing aluminum alloy sample was immersed in 50g / L sodium hydroxide, and the temperature was maintained at 55°C for 6 minutes.

[0056] (4) Light out. The above-mentioned chemically degreasing aluminum alloy sample was immersed in 200g / L nitric...

Example Embodiment

[0063] Example 3:

[0064] Take 20×70×2mm LY12 aluminum alloy sample for use.

[0065] (1) Polishing. Sand with water-resistant sandpaper to 800 # .

[0066] (2) Chemical degreasing. First, prepare the chemical degreasing agent, and add the following formula:

[0067] Component

[0068] The components other than the above-mentioned deionized water are respectively dissolved in deionized water according to the formula ratio, mixed to prepare an aqueous solution, and put into a container for later use. The aluminum alloy sample to be processed was immersed in the above-mentioned aqueous solution, and the temperature of the solution was maintained at 55° C. for 5 minutes.

[0069] (3) Alkaline corrosion. The above-mentioned chemically degreasing aluminum alloy sample was immersed in 50g / L sodium hydroxide, and the temperature was maintained at 55°C for 6 minutes.

[0070] (4) Light out. The above-mentioned chemically degreasing aluminum alloy sample was immersed in 200g / L ...

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Abstract

An aluminum alloy surface chemical method belongs to the fine chemical field. The treatment method is to put the aluminum alloy into the bath liquid containing potassium permanganate 0.01 to 10g/L, titanous sulfate 0.01 to 5g/L, wetter sodium dodecylbenzene sulfonate 0.1 to 10g/L, with the pH value being 1 to 4, and the temperature of 40 to 90DEG C to treat for 1 to 8 minutes, and then seal with boiled water for 20 to 30 minutes, and finally an even, fine golden conversion film with certain thickness is obtained on the surface of the aluminum alloy. The conversion film has excellent corrosion resistance performance. The invention can well solve the problems that products or emission during or after treatment of the current chromate solution to the aluminum alloy surface contain sexivalent chromium, which severely pollute the environment and harm the health of human body, etc; and the corrosion resistance of the invention is equal to that after treatment by the chromate solution.

Description

technical field [0001] The invention relates to a chemical treatment method for the surface of aluminum alloy, which is a novel, high-performance, green and environment-friendly method for forming a layer-like dense nano-golden oxide film on the surface of the aluminum alloy through chemical treatment to enhance the corrosion resistance of the aluminum alloy. The aluminum alloy corrosion-resistant surface treatment process and technology belong to the field of fine chemical industry. Background technique [0002] Aluminum is a non-ferrous metal that is second only to steel in terms of output and consumption in the world. With the continuous development of modern science and technology and the continuous emergence of new industrial fields, the use of aluminum is becoming more and more extensive, the demand is increasing day by day, and it is playing an increasingly important role in the national economy. Among the 124 industries in our country, 113 departments use aluminum p...

Claims

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Application Information

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IPC IPC(8): C23C22/56C23G1/22C23F1/36
Inventor 熊金平吕勇武左禹
Owner BEIJING UNIV OF CHEM TECH
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