CN103184445A - Chemical oxidation solution composition for aluminium-alloy surface and chemical oxidation process - Google Patents
Chemical oxidation solution composition for aluminium-alloy surface and chemical oxidation process Download PDFInfo
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- CN103184445A CN103184445A CN2011104445424A CN201110444542A CN103184445A CN 103184445 A CN103184445 A CN 103184445A CN 2011104445424 A CN2011104445424 A CN 2011104445424A CN 201110444542 A CN201110444542 A CN 201110444542A CN 103184445 A CN103184445 A CN 103184445A
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Abstract
The invention discloses a chemical oxidation solution composition for an aluminium-alloy surface. The composition is composed of the components in the following concentrations: 18-22 g/l of chromic anhydride (CrO3), 8-12 g/l of potassium ferricyanide (K3Fe(CN)6), 3-5 ml/l of nitric acid (HNO3), 0.75-1.5 g/l of sodium fluoride (NaF), and 1 g/l of boric acid (H3BO3). The invention discloses a process method for performing chemical oxidation treatment on an aluminium-alloy surface by adopting an oxidation solution composition in a chemical oxidation process, wherein the method is good in the effect of the chemical oxidation treatment for the aluminium-alloy surface; the quality of the formed chemical oxidation film achieves standard requirements; and the aluminium-alloy oxidation film layer treated by the chemical oxidation process is suitable for chemical oxidation for the welding joint parts of large components.
Description
Technical field
The present invention relates to a kind of aluminum alloy surface chemical oxidation liquid composite; The invention still further relates to a kind of topochemistry oxidizing process of aluminum alloy surface, this technology uses above-mentioned chemical oxidation liquid composite to carry out the chemical oxidation of aluminum alloy surface.
Background technology
The corrosion potential of aluminium is more negative, and general corrosion takes place easily, and galvanic corrosion is outstanding especially with other metallic contact the time, and therefore, aluminum alloy part must be strengthened surfacecti proteon.
The most frequently used surface treatment method of aluminum current alloy has chemical oxidation, anodic oxidation, differential arc oxidation, coating etc., and wherein chemical oxidation hangs down and easy to operate being used widely because of cost.Disclosed chemical oxidation process prescription has a variety of, and processing method generally adopts the method for solution impregnation, coating.
At present, large aluminum alloy parts locally such as weld seam or the position such as reprocess and do not have rete can not advance the situation that groove carries out chemical oxidation again, need to adopt the method for manual coating, and operation should be carried out at ambient temperature.Therefore, it is simple to study a kind of solution composition, and the technical recipe of processing ease and method improve the topochemistry oxidation film layer quality of aluminum alloy surface, improve membranous layer corrosion resistance, is one of the approach that solves the surface oxidation protection question of large aluminum alloy part.
Summary of the invention
One of the object of the invention provides a kind of chemical oxidation liquid composite of the chemical oxidation process for above-mentioned aluminum alloy surface.
Two of the object of the invention is at the large aluminum alloy part that is not suitable for into channelization oxidation, and a kind of chemical oxidation process of aluminum alloy surface is provided, and forms one deck chemical oxidation rete, to improve the corrosion resistance nature of aluminum alloy part.
In order to solve the problems of the technologies described above, the invention provides a kind of chemical oxidation liquid composite of the chemical oxidation process for aluminum alloy surface, said composition is made up of the component of following concentration:
Chromic anhydride (CrO
3) 18～22g/l;
The Tripotassium iron hexacyanide (K
3Fe (CN)
6) 8～12g/l;
Nitric acid (HNO
3) 3～5ml/l;
Sodium Fluoride (NaF) 0.75～1.5g/l;
Boric acid (H
3BO
3) 1g/l;
Described chemical oxidation liquid composite is by above-mentioned chromic anhydride (CrO
3), the Tripotassium iron hexacyanide (K
3Fe (CN)
6, nitric acid (HNO
3), Sodium Fluoride (NaF), boric acid (H
3BO
3) wait each component mixed dissolution to form.
In order one of to solve the problems of the technologies described above, the invention provides a kind of chemical oxidation process of aluminum alloy surface, comprise following step:
Chemical oxidation, with cotton gauze dip in get above-mentioned chemical oxidation liquid composite carry out the pad pasting oxidation in aluminum alloy surface, the temperature of chemical oxidation is room temperature;
The pad pasting oxidization time is 20～30 minutes, and is even until the chemical oxidation rete outward appearance of aluminum alloy surface, the rete color by sundown to dark brown yellow;
Adopt topical application to carry out anti-corrosion experiment, under 26 ℃ experiment condition, the chemical oxidation rete is measured.
Beneficial effect of the present invention and advantage are:
1, solidity to corrosion is good, and the oxidizing solution composition is effective to the chemical oxidation of aluminum alloy part weld seam, and membranous layer corrosion resistance is good, adopts the anti-corrosion experiment of topical application, and under the equal temperature experiment condition, the anti-corrosion time is long.
2, thicknesses of layers aspect is handled the oxidation film layer thickness that obtains through surface chemistry oxidizing process of the present invention and can be reached 2～3 μ m.
Aluminum alloy surface chemical oxidation process of the present invention is handled the chemical oxidation rete that obtains, and still all is being higher than the general chemistry oxidation film layer aspect the salt spray resistance at thickness, can be applied to the aluminum alloy part weld seam or reprocess the topochemistry oxidizing process at position.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
Embodiment 1
The aluminum alloy part processing process comprises part welding processing, preliminary examination, localised protection, pre-degreasing successively, polishes, cleans, blows off, chemical oxidation, 10 steps such as cleans, dries up, and wherein chemical oxidation is the present embodiment step.
In the present embodiment, the concrete composition of chemical oxidation solution is as shown in table 1:
The composition of table 1. surface chemistry oxidizing solution
In the present embodiment, chemical oxidation adopts the pad pasting oxidation to carry out 25 minutes at ambient temperature, and the rete outward appearance is even after the oxidation, is sundown to dark brown yellow.The chemical oxidation rete is measured, and the result is as shown in table 2.
Table 2. aluminum alloy chemically oxidation film layer performance
Embodiment 2
In the present embodiment, the concrete composition of chemical oxidation solution is as shown in table 3:
The composition of table 3. topochemistry oxidizing solution
In the present embodiment, chemical oxidation adopts the pad pasting oxidation to carry out 25 minutes at ambient temperature, and the rete outward appearance is even after the oxidation, is sundown to dark brown yellow.The chemical oxidation rete is measured, and the result is as shown in table 4.
Table 4. aluminum alloy chemically oxidation film layer performance
Embodiment 3
In the present embodiment, the concrete composition of surface chemistry oxidation tank liquor is as shown in table 5:
The composition of table 5. topochemistry oxidizing solution
In the present embodiment, chemical oxidation adopts the pad pasting oxidation to carry out 25 minutes at ambient temperature, and the rete outward appearance is even after the oxidation, is sundown to dark brown yellow.The chemical oxidation rete is measured, and the result is as shown in table 6.
Table 6. aluminum alloy chemically oxidation film layer performance
The present invention introduces the pad pasting chemical oxidation method in the technology of aluminum alloy chemically oxidation, has strengthened the corrosion resisting property of chemical oxidation rete; The liquid composite that the present invention relates to, fine to the chemical oxidation effect of aluminum alloy part weld seam, to compare with common brushing method, membranous layer corrosion resistance is better.The oxidation film layer performance is mainly reflected in corrosion resisting property and thicknesses of layers, according to test-results, handle the oxidation film layer thickness that obtains through surface chemistry oxidizing process of the present invention and can reach 2～3 μ m, adopt the topical application Kesternich test, under 26 ℃ test conditions, the anti-corrosion time reaches 60～66s, and general chemistry oxidation film layer thickness is thinner, is 0.5～2 μ m, adopts the topical application Kesternich test, under 26 ℃ test conditions, the anti-corrosion time is 40～50s.
These embodiment are interpreted as only being used for explanation the present invention and are not used in restriction protection scope of the present invention.After the content of having read the present invention's record, those skilled in the art can make various changes or modifications the present invention, and these equivalences change and modify and fall into claim of the present invention institute restricted portion equally.
Claims (2)
1. aluminum alloy surface chemical oxidation liquid composite, it is characterized in that: described composition is made up of the component of following concentration:
Chromic anhydride (CrO
3) 18～22g/l;
The Tripotassium iron hexacyanide (K
3Fe (CN)
6) 8～12g/l;
Nitric acid (HNO
3) 3～5ml/l;
Sodium Fluoride (NaF) 0.75～1.5g/l;
Boric acid (H
3BO
3) 1g/l;
Described chemical oxidation liquid composite is by above-mentioned chromic anhydride (CrO
3), the Tripotassium iron hexacyanide (K
3Fe (CN)
6, nitric acid (HNO
3), Sodium Fluoride (NaF), boric acid (H
3BO
3) wait each component mixed dissolution to form.
2. a chemical oxidation process that utilizes the described composition of claim 1 to carry out aluminum alloy surface is characterized in that, comprises following step:
Chemical oxidation, with cotton gauze dip in get above-mentioned chemical oxidation liquid composite carry out the pad pasting oxidation in aluminum alloy surface, the temperature of chemical oxidation is room temperature;
The pad pasting oxidization time is 20～30 minutes, and is even until the chemical oxidation rete outward appearance of aluminum alloy surface, the rete color by sundown to dark brown yellow;
Adopt topical application to carry out anti-corrosion experiment, under 26 ℃ experiment condition, the chemical oxidation rete is measured.
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| CN2011104445424A CN103184445A (en) | 2011-12-28 | 2011-12-28 | Chemical oxidation solution composition for aluminium-alloy surface and chemical oxidation process |
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| CN2011104445424A CN103184445A (en) | 2011-12-28 | 2011-12-28 | Chemical oxidation solution composition for aluminium-alloy surface and chemical oxidation process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866316A (en) * | 2014-02-27 | 2014-06-18 | 北京航天控制仪器研究所 | Chemical passivation method of beryllium material |
| CN104451634A (en) * | 2014-12-26 | 2015-03-25 | 湖南金裕化工有限公司 | Aluminum and aluminum alloy passivation solution, preparation method and using method thereof |
| CN107740084A (en) * | 2017-09-30 | 2018-02-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of beryllium alumin(i)um alloy and preparation method thereof |
| CN107858733A (en) * | 2017-11-07 | 2018-03-30 | 广东永利坚铝业有限公司 | A kind of Aluminum Coloring method |
| WO2019006618A1 (en) * | 2017-07-03 | 2019-01-10 | 深圳市宏昌发科技有限公司 | Passivator, surface processing method of metal-plated part and metal workpiece |
| CN114318316A (en) * | 2021-10-28 | 2022-04-12 | 中国航发西安动力控制科技有限公司 | Aluminum alloy colorless chemical oxidation treatment solution and process |
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| CN101597758A (en) * | 2009-06-26 | 2009-12-09 | 袁兴 | Low chromium anticorrosive chemical conversion treating fluid on surface of constructive aluminium profile and using method thereof |
| CN101781763A (en) * | 2010-04-01 | 2010-07-21 | 中国兵器工业第五九研究所 | Preparation method of cast aluminum alloy film coat |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866316A (en) * | 2014-02-27 | 2014-06-18 | 北京航天控制仪器研究所 | Chemical passivation method of beryllium material |
| CN103866316B (en) * | 2014-02-27 | 2016-05-04 | 北京航天控制仪器研究所 | A kind of beryllium material chemical passivation processing method |
| CN104451634A (en) * | 2014-12-26 | 2015-03-25 | 湖南金裕化工有限公司 | Aluminum and aluminum alloy passivation solution, preparation method and using method thereof |
| CN104451634B (en) * | 2014-12-26 | 2017-05-03 | 湖南金裕化工有限公司 | Aluminum and aluminum alloy passivation solution, preparation method and using method thereof |
| WO2019006618A1 (en) * | 2017-07-03 | 2019-01-10 | 深圳市宏昌发科技有限公司 | Passivator, surface processing method of metal-plated part and metal workpiece |
| CN110809638A (en) * | 2017-07-03 | 2020-02-18 | 深圳市宏昌发科技有限公司 | Passivating agent, metal plated part surface treatment method and metal workpiece |
| CN107740084A (en) * | 2017-09-30 | 2018-02-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of beryllium alumin(i)um alloy and preparation method thereof |
| CN107858733A (en) * | 2017-11-07 | 2018-03-30 | 广东永利坚铝业有限公司 | A kind of Aluminum Coloring method |
| CN114318316A (en) * | 2021-10-28 | 2022-04-12 | 中国航发西安动力控制科技有限公司 | Aluminum alloy colorless chemical oxidation treatment solution and process |
| CN114318316B (en) * | 2021-10-28 | 2024-01-12 | 中国航发西安动力控制科技有限公司 | Colorless chemical oxidation treatment solution and process for aluminum alloy |
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Application publication date: 20130703 |