CN102409381B - Method for producing aluminum alloy oxide-film layer under strong magnetic field - Google Patents
Method for producing aluminum alloy oxide-film layer under strong magnetic field Download PDFInfo
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- CN102409381B CN102409381B CN201110372406.9A CN201110372406A CN102409381B CN 102409381 B CN102409381 B CN 102409381B CN 201110372406 A CN201110372406 A CN 201110372406A CN 102409381 B CN102409381 B CN 102409381B
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Abstract
The invention relates to a method for producing an aluminum alloy oxide-film layer under a strong magnetic field, which belongs to the metal surface engineering field. The invention is characterized in that a substrate is pretreated, and is placed in a reaction tank, the reaction tank is arranged in a superconductive strong magnetic field with 1-10T. An aluminum alloy substrate taken as an anode is horizontally or vertically placed with the magnetic field direction. The aluminum alloy substrate is electrified for 10-60 minutes under 4-20V constant voltage, the oxidation is completed to generate a compact, microstructure controllable and protective mixed crystal alumina film. The invention provides the method for producing high quality mixed crystal oxide-film layer with high efficiency, the proportion of crystalline state alumina and amorphous alumina in the oxide-film layer under strong magnetic field can be changed by the strong magnetic field, Simultaneously the thickness of the film layer is increased, the frictional coefficient of the protection film layer is reduced, therefore the performance of the aluminum alloy protection film layer can be enhanced.
Description
Technical field
The preparation method who the present invention relates to aluminium alloy protection oxide film under a kind of high-intensity magnetic field, belongs to metallic surface engineering field.
Background technology
In numerous aluminum alloy surface technology, anodic oxidation is most widely used and the most successful technology, is also to research and develop the most deep and the most comprehensive technology.Anode oxide film is described as the universal meter surface protective film of aluminium alloy, is applied in electronics industry, aerospace industry more, also has a wide range of applications in building materials industry, machinery manufacturing industry.
At present, high-intensity magnetic field has been widely applied in many research fields of Materials science, has found to have in a large number the phenomenon of great theory value and using value, demonstrates high-intensity magnetic field wide application prospect in material science.When there is the convective motion causing due to gravity field in conductive melt, Seebeck effect (Seeback effect) and peltier effect (Peltier effect) that externally-applied magnetic field produces can cause the stability of solid-liquid interface to change.Utilize flowing of high-intensity magnetic field control liquid, likely control solute distribution in material, Solidification Structures, chemical reaction rate etc., there is great theory significance and using value.In the Surface Engineering of metallic substance, the technology of preparing of application strong magnetic field circumstance is less.In high-intensity magnetic field, carry out anodizing of aluminium processing, can change the structure organization form of growth behavior and the rete of oxidation film layer, be conducive to obtain high-quality protectiveness mixed crystal oxidation film layer.
Summary of the invention
The object of this invention is to provide a kind of efficiently prepare mixed crystal alumina protective layer layer under high-intensity magnetic field by anonizing method.
The present invention be more particularly directed to the preparation method of aluminium alloy mixed crystal oxidation film layer under a kind of high-intensity magnetic field, adopt sulfuric acid DC anodizing method to manufacture, the method has following processing step:
A. aluminium alloy substrate is carried out to following pre-treatment: rear ultrasonic cleaning is washed in Solvent degreasing, etch, washing, chemical rightenning again dries;
b.use white sulfate of alumina and sulfuric acid preparation electrolytic solution, in water-bath mode, electrolyzer is heated to 20～70 ℃;
c.place in superconducting intense magnetic field as anode using pretreated aluminium alloy substrate, connect power supply, keep permanent position voltage 4～20V;
d.can be as required will become parallel or vertical position to lay as the aluminium alloy substrate of anode and field direction;
e.apply the high-intensity magnetic field of 1～10 T (tesla) by superconducting coil, switch on power and start to carry out reaction process, the time is 10～60 minutes;
f.adopt above-mentioned method on alloy matrix aluminum, can make the aluminum oxide mixed crystal film of different thickness.
Accompanying drawing explanation
Fig. 1 is that the oxidized aluminum alloy thicknesses of layers that the present invention obtains under different magnetic field intensity is managed the variation of time everywhere.
Fig. 2 is scanning electronic microscope (SEM) photo of the aluminium alloy anode oxide film layer that obtains under 2T of the present invention and 4T magnetic field condition.
Fig. 3 is the content of oxygen in the oxidation film layer that obtains under different magnetic field intensity of the present invention.
Fig. 4 is the X-ray powder diffraction figure (XRD) that the present invention obtains oxidation film layer under different magnetic field intensity.
Embodiment
After now specific embodiment of the invention example being described in.
Embodiment:
Preparation electrolytic solution medicine is analytical pure sulfuric acid aluminium (H
2sO
4) and sulfuric acid (H
2sO
4).Anodic oxidation solution consists of 140 g/L H
2sO
4with 3 g/L Al
2(SO4)
3.Sample carries out oxidation experiment after oil removing, washing, chemical rightenning are washed again.Anodic oxidation experiment is carried out respectively under 0,1,2,4 T magnetic fields, and oxidization time is respectively 10,20,30 minutes.Become parallel or vertical position to lay as the fine aluminium sheet of anode and field direction.
Adopt TT-230 digital thickness meter to measure to obtained sample, each sample is got the mean value of 5 points as oxide thickness.The surface topography of sample, constituent content are analyzed and are adopted Shimadzu S3400N scanning electronic microscope to observe.Utilize Ultima IV type X-ray diffractometer of science to analyze the weave construction at sample rete.The wear resistance of oxidation film layer is measured and is used the omnipotent friction wear testing machine of MMW-1A to complete, and friction pair is the little thrust ring that reaches the 45# steel work of 45-50HRC through quench treatment hardness, and the time is 5min, and test force adopts 10N, and rotating speed is 2r/min.Corrosion resistant test adopts spot test.
Obtain the oxidation film layer thickness under different condition through thickness tester, result as shown in Figure 1.Show along with the thickness that applies oxidation film layer in magnetic field all reduces in various degree.And under 2T and 4T magnetic field condition the surface topography of rete as shown in Figure 2, as seen with the enhancing of magneticstrength, bore dia diminishes and rete becomes fine and close, this type of rete is conducive to the raising of hardness and wear resistance.Under different magnetic field intensity, the atomic percentage conc result of the middle oxygen element of anodic oxidation 30min rete, as accompanying drawing 3, can find out that applying of magnetic field do not affect the content of element in rete.Under different magnetic field intensity, obtain the X-ray powder diffraction result of oxidation film layer as shown in Figure 4, can find out, the thing of test is mutually mainly by matrix Al and γ-Al
2o
3composition.Without γ-Al in sample under magnetic field
2o
3mostly being mutually non-crystalline state occurs in a large number; Apply after high-intensity magnetic field non-crystalline state γ-Al
2o
3enhancing with magnetic field reduces gradually, until completely dissolve under the magnetic field of 4T.
Detect respectively the wear resistance of oxidation film layer under 0T, 4T condition.Start after 36 s without the oxidation film layer under the action of a magnetic field to gall, frictional coefficient is the compound of matrix and rete.The rete acting under 4T vertical magnetic field does not all gall in 360 s always, and its wear resistance is than significantly improving without the rete under the action of a magnetic field.
Oxidation film layer under different magnetic field intensity is carried out to the experiment of potassium bichromate hydrochloric acid soln drop simultaneously, carry out solidity to corrosion comparison, specimen surface occurs that the time changing is all about 15 minutes.Show that the oxidation film layer solidity to corrosion obtaining under magnetic field condition does not decline, the solidity to corrosion of sample segment is slightly improved.
Claims (1)
1. a preparation method for oxidized aluminum alloy rete under high-intensity magnetic field, adopts sulfuric acid DC anodizing method to manufacture, and its processing step is as follows:
A. aluminium alloy substrate is carried out to following pre-treatment: rear ultrasonic cleaning is washed in Solvent degreasing, etch, washing, chemical rightenning again dries, and it is characterized in that:
B. use white sulfate of alumina and sulfuric acid preparation electrolytic solution, in water-bath mode, electrolytic solution is heated to 20～70 ℃;
C. place in superconducting intense magnetic field as anode using pretreated aluminium alloy substrate, connect power supply, keep permanent position voltage 4～20V;
D. can be as required will become parallel or vertical position to lay as the aluminium alloy substrate of anode and field direction;
E. apply the high-intensity magnetic field of 1～4 tesla by superconducting coil, switch on power and start to carry out reaction process, the time is 10～60 minutes;
F. adopt above-mentioned method on alloy matrix aluminum, can make the aluminum oxide mixed crystal film of different thickness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110372406.9A CN102409381B (en) | 2011-11-22 | 2011-11-22 | Method for producing aluminum alloy oxide-film layer under strong magnetic field |
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| CN201110372406.9A CN102409381B (en) | 2011-11-22 | 2011-11-22 | Method for producing aluminum alloy oxide-film layer under strong magnetic field |
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| CN102409381A CN102409381A (en) | 2012-04-11 |
| CN102409381B true CN102409381B (en) | 2014-05-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313665A (en) * | 2014-11-10 | 2015-01-28 | 沈阳理工大学 | Method of increasing content of magnetic powder in magnesium alloy micro-arc oxidation membrane |
| CN105506706B (en) * | 2016-01-04 | 2018-01-19 | 沈阳建筑大学 | A kind of aluminium alloy anode oxide coloring treatment process |
| CN108411259A (en) * | 2018-03-27 | 2018-08-17 | 宁波优适捷传动件有限公司 | A kind of aluminum alloy materials and its surface treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103213A (en) * | 1987-04-30 | 1987-12-30 | 西北电讯工程学院 | Form the method for oxide film in the aluminium electrolyticing coloring technology |
| US5620582A (en) * | 1995-06-02 | 1997-04-15 | Lerner; Moisey M. | Energy-saving process for architectural anodizing |
| CN101845653A (en) * | 2010-04-14 | 2010-09-29 | 中国船舶重工集团公司第十二研究所 | Preparation method of micro-arc oxidation film layer under effect of magnetic field |
-
2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103213A (en) * | 1987-04-30 | 1987-12-30 | 西北电讯工程学院 | Form the method for oxide film in the aluminium electrolyticing coloring technology |
| US5620582A (en) * | 1995-06-02 | 1997-04-15 | Lerner; Moisey M. | Energy-saving process for architectural anodizing |
| CN101845653A (en) * | 2010-04-14 | 2010-09-29 | 中国船舶重工集团公司第十二研究所 | Preparation method of micro-arc oxidation film layer under effect of magnetic field |
Non-Patent Citations (4)
| Title |
|---|
| Adriana Ispas等.Effects of a magnetic field on growth of porous alumina films on aluminum.《Electrochimica Acta》.2010,第55卷(第13期), |
| Effects of a magnetic field on growth of porous alumina films on aluminum;Adriana Ispas等;《Electrochimica Acta》;20100501;第55卷(第13期);第4181页左栏第2段和右栏第3-5段、第4182页左栏第2-3段及图3 * |
| 杨维春等.磁场影响铝的阳极氧化膜的形成与封闭的研究.《化工时刊》.2007,第21卷(第5期),第11-13页. |
| 磁场影响铝的阳极氧化膜的形成与封闭的研究;杨维春等;《化工时刊》;20070531;第21卷(第5期);试验方法和结论 * |
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