CN202022980U - Aluminum with surface compounded with nanophase ceramics silane composite membrane - Google Patents
Aluminum with surface compounded with nanophase ceramics silane composite membrane Download PDFInfo
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- CN202022980U CN202022980U CN2011200845122U CN201120084512U CN202022980U CN 202022980 U CN202022980 U CN 202022980U CN 2011200845122 U CN2011200845122 U CN 2011200845122U CN 201120084512 U CN201120084512 U CN 201120084512U CN 202022980 U CN202022980 U CN 202022980U
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- aluminum
- composite membrane
- silane
- compounded
- nanophase
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Abstract
The utility model discloses aluminum with a surface compounded with a nanophase ceramics silane composite membrane, which comprises an aluminum body and a composite membrane compounded on the surface of the aluminum body, wherein the composite membrane adopts a collosol-gel technology, and is characterized in that silane conditioning fluid added with nanoscale SiO2 is used for processing and dewatering, a three-dimensional net structure is formed by an Si-O-Si bond, and an Si-O-Si covalent bond is compounded with the surface of the aluminum. Because the nanophase ceramics silane composite membrane is subjected to non-chrome processing, the problem of chrome pollution in the aluminum industry is solved. No substance which affects forming membranes can be adhered to the surface of the aluminum in the process of surface treatment, and thus the aluminum does not need to be washed before being sprayed. Added nanophase filler is dispersed in a membrane layer of a net structure; after the nanophase filler is compounded with hydrolyzing silane, a bridged bond can be formed on the surface of the aluminum to cause the hydrolyzing silane to be tightly combined with the nanophase filler without fissures; and the surface is compounded with the aluminum in a combination mode of chemical covalent bonds to obviously improve the adhesion force of a coating.
Description
Technical field
The utility model relates to the aluminium material surface processing technology field, relates in particular to be compounded with before aluminium sprays the aluminium of composite membrane.
Background technology
At present, aluminium adopts chromic salt to carry out surface treatment to form chromizing layer in spraying as last, and central chromaking waste contains objectionable constituent such as a large amount of hexavalent chromiums.Owing to these sexavalent chromes and its loss diffusion constitutes pollution hazard to ecotope.Next is the strong basicity harm of chromium slag.When the chromium slag is stored up in the open, dash to drench a large amount of hexavalent chromium in back through long-term rain and ooze, run off, infiltrate the face of land with rainwater is molten, thus polluted underground water, rivers, lake, and then endanger farmland, aquatic products and HUMAN HEALTH.Hexavalent chromium is very big to the murder by poisoning of HUMAN HEALTH, finds that through scientific research it has carcinogenesis in human body.For this reason, national governments and relevant department begin to do one's utmost to advocate exploitation and the development with environment compatibility environment-friendly materials and green material.Can predict, under the support of relevant policies rules, the application of chromic salt in industrial production will be subjected to more and more stricter restriction, and aluminium section bar does not have the chromaking process for treating surface will have the wide industrialization prospect and the extensive market requirement.
Owing to contain fluorion in traditional chromaking tank liquor technology, aluminium can produce on the surface of aluminum fluoride attached to the aluminium workpiece in treating processes, aluminum fluoride is water insoluble, if without washing, with the sticking power that has a strong impact on after aluminium sprays, coating even come off, so aluminium must be through washing before spraying.
The utility model content
The technical problems to be solved in the utility model provides the aluminium that is compounded with nano ceramics silane composite membrane that need not to wash before a kind of free of contamination, spraying.
The technical scheme that adopts for solving the problems of the technologies described above: 1, a kind of surface recombination has the aluminium of nano ceramics silane composite membrane, include the aluminium body, and the composite membrane that is compounded in the aluminium body surface, it is characterized in that: described composite membrane is to use sol-gel technique by having added nano level SiO
2Silane treatment liquid handle, through dewatering after with Si-O-Si key formation tridimensional network and with Si-O-Al covalent linkage and aluminium material surface compound composite membrane.
Silane is silica-based organism of a class and the composite compound that forms of mineral compound, forms the activity-Si-OH group (silicon hydroxyl) of capacity after its hydrolysis in solution.The hydroxyl of-Si-OH group and aluminium material surface-OH generates the Si-O-Al covalent linkage through further dehydration polymerization on the interface, silane and aluminium material surface are closely linked.And-aggregate into the Si-O-Si key through further dehydration between the Si-OH group, and constitute silane film with tridimensional network.Use the sol-gel technique principle, become film catalyst as chemical conversion film, in silane liquid, be added into nano level SiO by a kind of organic acid (as Weibull etc.)
2Constituted the nano ceramics conversion coating treating fluid, by dipping or spray, film forming is worked in coordination with in further dehydration on aluminium again, and this has just formed nano ceramics silane composite film chromium-free treatment technology.
Adopt the beneficial effect that the utility model brought: 1, nano ceramics silane composite membrane is a chromium-free treatment, has solved the pollution of chromium problem in the aluminium industry.2, silane system is a kind of organism, does not produce the film forming material of any influence attached to aluminium material surface in surface treatment process, so aluminium need not washing before spraying.3, the Nano filling of Tian Jiaing is dispersed in the cancellated rete, can form a kind of bridged bond with the silane of hydrolysis at aluminium material surface after compound, makes and combines closely and flawless, with the binding pattern and the compound adhesive force of coatings that significantly improved of aluminium of chemical covalent linkage.
Description of drawings
Fig. 1 has the structural representation of the aluminium of nano ceramics silane composite membrane for the utility model surface recombination.
Embodiment
As shown in Figure 1,1 is aluminium among the figure, and 2 is nano ceramics silane composite membrane, and its concrete film forming step is as follows:
1, acid deoiling: free acid (H
2SO
4) 130g～200g/L, temperature is a normal temperature, time 1min～3min.
2, washing (tap water maintenance overflow): pH value 〉=2, temperature are normal temperature, time 1min～2min.
3, alkaline etching: free alkali (NaOH) 40～60g/L, temperature is a normal temperature, time 1min～3min, the alkaline etching etch quantity is 1.5g/m at least
2More than.
4, washing (tap water maintenance overflow): pH value≤10, temperature are normal temperature, time 1min～2min.
5, neutralization: free acid (HNO
3) 150～200g/L, temperature is a normal temperature, time 1min～3min.
6, washing (tap water maintenance overflow): pH value 〉=5, temperature are normal temperature, time 1min～3min.
7, pure water is washed (maintenance overflow), pH value 6.0～7.0, and specific conductivity＜200us/cm, temperature is a normal temperature, time 1min～3min.
8, silane treatment (Eco003, Eco011, PSi-2), silicone content 25～35mg/L, pH value 6.0～7.0, specific conductivity 30～200us/cm, temperature is a normal temperature, time 20s～2min.
9, drip-dry: the section bar that silane treatment is good carries out drip-dry, and drip-dry is not till have an obvious water droplet.
10, oven dry: 70 ℃～80 ℃ of temperature, time 10min～15min, the moisture oven dry is as the criterion.
After the drying dehydration, with the bridged bond bonding, tight flawless nano ceramics silane composite membrane need not washing, can carry out next step aluminium spraying coating process at the compound last layer of aluminium material surface.
Claims (1)
1. a surface recombination has the aluminium of nano ceramics silane composite membrane, includes the aluminium body, and the composite membrane that is compounded in the aluminium body surface, it is characterized in that: described composite membrane is to use sol-gel technique by having added nano level SiO
2Silane treatment liquid handle, through dewatering after with Si-O-Si key formation tridimensional network and with Si-O-Al covalent linkage and aluminium material surface compound composite membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200845122U CN202022980U (en) | 2011-03-28 | 2011-03-28 | Aluminum with surface compounded with nanophase ceramics silane composite membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200845122U CN202022980U (en) | 2011-03-28 | 2011-03-28 | Aluminum with surface compounded with nanophase ceramics silane composite membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202022980U true CN202022980U (en) | 2011-11-02 |
Family
ID=44847939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200845122U Expired - Lifetime CN202022980U (en) | 2011-03-28 | 2011-03-28 | Aluminum with surface compounded with nanophase ceramics silane composite membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202022980U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106498379A (en) * | 2016-11-16 | 2017-03-15 | 揭阳市腾晟科技咨询有限公司 | A kind of metallic material surface treating method |
| DE102022205823A1 (en) | 2021-09-27 | 2023-03-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | Silanol based composite composition |
-
2011
- 2011-03-28 CN CN2011200845122U patent/CN202022980U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106498379A (en) * | 2016-11-16 | 2017-03-15 | 揭阳市腾晟科技咨询有限公司 | A kind of metallic material surface treating method |
| DE102022205823A1 (en) | 2021-09-27 | 2023-03-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | Silanol based composite composition |
| WO2023046993A1 (en) | 2021-09-27 | 2023-03-30 | Robert Bosch Gmbh | Silanol-based composite composition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |