Novel hole sealing tank liquid for aluminum alloy oxidation section and sealing method by using the same

A sealing groove, oxidation technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as affecting the surface quality, achieve good sealing effect and improve sealing efficiency.

Inactive Publication Date: 2012-12-12
佛山金兰铝厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if you want to achieve a particularly green surface effect, you cannot simply rely on increasing the concentration of nickel ions; this is because the main component in the room temperature sealing bath is nickel fluoride, and the content of fluoride ions and nickel ions has a certain ratio. If the concentration is too high, a layer of sealing dust will be produced on the oxidized surface, which will affect the surface quality

Method used

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  • Novel hole sealing tank liquid for aluminum alloy oxidation section and sealing method by using the same
  • Novel hole sealing tank liquid for aluminum alloy oxidation section and sealing method by using the same

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 2

[0031] Add 50 grams of nickel carbonate, 5 grams of chromium fluoride, 50 grams of sodium dodecyl sulfonate and 180 grams of sodium methylene bisbenzyl naphthalene sulfonate into 50 ml of dilute acetic acid solution, stirring while adding until the salt Completely dissolve to obtain a high-concentration sealing bath; then continue to add water to the sealing bath until nickel ions are diluted to 0.5g / L-5g / L and chromium fluoride is diluted to 0.2g / L.

[0032] In this embodiment, by increasing the content of the surfactant, the adsorption capacity of the sealing bath can be effectively improved, and the sealing bath can be directly adsorbed on the surface of the workpiece by spraying.

preparation Embodiment 3

[0034] Add 50 grams of nickel acetate, 5 grams of chromium fluoride, 50 grams of sodium dodecylsulfonate, a mixture of 200 grams of methylnaphthalenesulfonate formaldehyde polycondensate and sodium naphthalene methylenesulfonate to 50ml of dilute acetic acid solution Stir while adding until the salts are completely dissolved to obtain a high-concentration sealing bath; then continue to add water to the sealing bath until the nickel ions are diluted to 0.5g / L-5g / L, and the chromium fluoride is diluted to 0.08g / L.

Embodiment 1

[0036] Such as figure 1 As shown, a method for sealing holes of aluminum alloy oxidized profiles, the specific steps include: the first step (step 1) preparation of dilute acetic acid solution, adding acetic acid dropwise to an acid-resistant tank filled with water to obtain dilute acetic acid solution.

[0037] The second step step2 is to dissolve the salt, slowly add nickel fluoride and chromium fluoride into the dilute acetic acid solution according to the weight to volume ratio, and stir while adding until the nickel fluoride and chromium fluoride are completely dissolved.

[0038] The third step step3 is to dilute the sealing bath solution, and continue to add water to the nickel fluoride solution until the nickel ions are diluted to 0.5g / L-1.5g / L, and the chromium fluoride is diluted to 0.1g / L.

[0039] The fourth step step4 is to adjust the pH value, and gradually add ammonia water to the bath to adjust the pH value to between 5-7;

[0040] The fifth step step5 is the ...

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Abstract

he invention provides a novel hole sealing tank liquid for an aluminum alloy oxidation section. The tank liquid is characterized by containing trivalent chromium ions with concentration of 0.05-0.5g / L and nickel ions with concentration of 0.5-5g / L. Preferably, the novel hole sealing tank liquid contains acetic acid, a surfactant and a dispersing agent, and has a pH value between 5 and 7 and concentration of the trivalent chromium ions of 0.1g / L. The novel hole sealing tank liquid for the aluminum alloy oxidation section provided by the invention utilizes a principle that trivalent chromium ions are greener than the nickel ions; and when transparent oxide film pores absorb a small amount of chromium ions, the film pores show a particularly green color, so as to realize a surface greening effect without influencing the surface quality. The invention also provides a sealing method based on the novel hole sealing tank liquid.

Description

technical field [0001] The invention relates to the field of metal surface reaction, in particular to a novel sealing bath solution for aluminum alloy oxidized profiles and a sealing method thereof. Background technique [0002] At present, the surface treatment methods of aluminum alloy oxidized profiles are mainly divided into two categories. One is the method of electrolytic oxidation of the profile and then electrophoretic painting, so that a transparent organic film is formed on the surface, which is called the electrophoretic profile. The other type is that after the profile is electrolytically oxidized, it is directly used as a finished product after sealing treatment, which is called an oxidized sealing profile. [0003] As we all know, the current sealing methods for aluminum alloy oxidized profiles mainly include normal temperature sealing and medium temperature sealing. Both use nickel ions as the main component of the sealing product; the main difference betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18
Inventor 范先才袁学中杨云生
Owner 佛山金兰铝厂有限公司
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