CN109989087A - A kind of aluminum aluminum sulfate closing process of aluminium alloy anode oxide film - Google Patents
A kind of aluminum aluminum sulfate closing process of aluminium alloy anode oxide film Download PDFInfo
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- CN109989087A CN109989087A CN201910272313.5A CN201910272313A CN109989087A CN 109989087 A CN109989087 A CN 109989087A CN 201910272313 A CN201910272313 A CN 201910272313A CN 109989087 A CN109989087 A CN 109989087A
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- aluminium alloy
- aluminum
- aluminum sulfate
- solution
- oxide film
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a kind of seal treatment techniques of aluminium alloy anode oxide film, comprising steps of 1) compound concentration is 1~10.5g/L aluminum aluminum sulfate hole sealing solution；It is 4~10 that the aluminium alloy after anodic oxidation, which is placed in pH value, again, handles 0.5~10min in the above-mentioned treatment fluid that temperature is 25~85 DEG C, while being stirred with magnetic stirrer, revolving speed 1000r/min；Then aluminium alloy is taken out from treatment fluid, again to dry up after ultrasonic cleaning after rinsing with deionized water.The method proposed by the present invention for carrying out Seal treatment to Process on Aluminum Alloy Oxidation Film using aluminum aluminum sulfate is environmentally friendly and cheap, is also remarkably improved the corrosion resisting property of aluminium alloy.Above-mentioned method for sealing also has the advantages that simple process, low energy consumption, is easy to implement.
Description
Technical field
It is molten in aluminum aluminum sulfate that the invention belongs to the technical field of anticorrosion of aluminium alloy more particularly to aluminium alloy anode oxide film
The method of Seal treatment is carried out in liquid.
Background technique
Aluminium alloy as non-ferrous metal structural material most widely used in modern industry be widely used in aerospace,
The industries such as automobile, building.In the case of room temperature, oxygen and water in air can be reacted with aluminium alloy produces comparatively dense Al2O3·
H2O or Al2O3Oxidation film, this layer of oxidation film can protect internal aluminium alloy no longer rotten in neutral or weakly acidic solution
Erosion, once but the use condition of environment or aluminium alloy becomes harsh, the effect of current oxidation film is no longer obvious.
Therefore, the corrosion resistance of aluminium alloy is further increased into a new problem, and oxidation film is formed using anodizing at present
It is domestic and international most common surface anticorrosion processing technique, the Process on Aluminum Alloy Oxidation Film after anodic oxidation is closed on this basis
Processing can effectively improve its corrosion resistance.For now, bichromate, nickel salt solution are most commonly used closings
Processing solution, but it is increasingly prominent the problems such as with environmental protection, technique, and new closing process research is imperative, aluminum aluminum sulfate tool
Have the advantages that environmental-friendly, low in cost, preparation process is simple, is also commonly used for the modification of metal.Therefore, aluminum aluminum sulfate is studied
Sealing of hole is corrosion proof on aluminium alloy to be influenced to be necessary.
Summary of the invention
Goal of the invention: the present invention is in view of the above-mentioned problems, propose a kind of aluminum aluminum sulfate closing of aluminium alloy anode oxide film
Technique.
Technical solution:
A kind of aluminum aluminum sulfate closing process of aluminium alloy anode oxide film, comprising steps of
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, it is molten to form the sealing of hole that concentration is 1~10.5g/L
Liquid；
2) aluminium alloy after anodic oxidation is placed in pH value is 4~10, in the above-mentioned hole sealing solution that temperature is 25~85 DEG C
0.5~10min is handled, while being stirred using magnetic stirrer, revolving speed 1000r/min；
3) aluminium alloy is taken out from hole sealing solution, again to dry up after ultrasonic cleaning after rinsing with deionized water.
Electro-chemical test is carried out in step 3) and then to obtained aluminium alloy, specific as follows:
Using three-electrode system, wherein sample to be tested is working electrode, and saturated calomel electrode is reference electrode, and platinum electrode is
Auxiliary electrode；Test solution is 3.5wt.%NaCl solution, and test temperature is 15-25 DEG C；It is loaded when AC impedance spectrometry
Pumping signal is sine wave, frequency range 105~10-2Hz, amplitude are ± 10mV；Electric potential scanning when polarization curve measures
Range is -0.5V~0.5V, sweep speed 0.5mV/s.
The concentration of the hole sealing solution is 5g/L, and pH value 6, temperature is 50 DEG C.
The concentration of the hole sealing solution is 8g/L, and pH value 8, temperature is 35 DEG C.
The concentration of the hole sealing solution is 5g/L, and pH value 7, temperature is 35 DEG C.
Compared with prior art, beneficial effects of the present invention:
(1) method proposed by the present invention for carrying out Seal treatment to Process on Aluminum Alloy Oxidation Film using aluminum aluminum sulfate is environmentally friendly and honest and clean
Valence is also remarkably improved the corrosion resisting property of aluminium alloy.
(2) present invention has the advantages that simple process, low energy consumption, is easy to implement.
Detailed description of the invention
Fig. 1 is that whether there is or not the polarization curves for using aluminum aluminum sulfate to carry out sealing pores.
Fig. 2 is that whether there is or not the ac impedance spectroscopy schematic diagrames for using aluminum aluminum sulfate to carry out sealing pores.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
It is of the invention it is a kind of aluminum aluminum sulfate is applied into the technique in the Seal treatment of Process on Aluminum Alloy Oxidation Film, specific steps are such as
Under:
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, the hole sealing solution concentration of formation is 1~10.5g/
L；
2) aluminium alloy after anodic oxidation is placed in pH value is 4~10, in the above-mentioned hole sealing solution that temperature is 25~85 DEG C
0.5~10min is handled, while being stirred with magnetic stirrer, revolving speed 1000r/min；
3) aluminium alloy is taken out from hole sealing solution, again to dry up after ultrasonic cleaning after rinsing with deionized water；
4) electro-chemical test: electro-chemical test generallys use three-electrode system, and wherein sample to be tested is working electrode, saturation
Calomel electrode is reference electrode, and platinum electrode is auxiliary electrode.Test solution is 3.5wt.%NaCl solution, test temperature 15-
25℃.The pumping signal loaded when AC impedance spectrometry is sine wave, frequency range 105~10-2Hz, amplitude be ±
10mV.Electric potential scanning range when polarization curve measures is -0.5V~0.5V, sweep speed 0.5mV/s.Fig. 1 and 2 is shown
Whether there is or not the polarization curves and ac impedance spectroscopy that use aluminum aluminum sulfate to carry out sealing pores, compare it is found that at the sealing of hole of aluminum aluminum sulfate
Reason greatly reduces corrosion electric current density, slows down the generation of corrosion.
Embodiment 1:
The aluminum aluminum sulfate seal treatment technique of the aluminium alloy anode oxide film of the embodiment of the present invention 1, specific steps:
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, the hole sealing solution concentration of formation is 5g/L；
2) aluminium alloy after anodic oxidation is placed in pH value is 6, handles 2min in the above-mentioned treatment fluid that temperature is 50 DEG C, together
When stirred with magnetic stirrer, revolving speed 1000r/min；
3) aluminium alloy is taken out from treatment fluid, again to dry up after ultrasonic cleaning after rinsing with deionized water.
Embodiment 2:
The aluminum aluminum sulfate seal treatment technique of the aluminium alloy anode oxide film of the embodiment of the present invention 2, specific steps:
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, the hole sealing solution concentration of formation is 8g/L；
2) aluminium alloy after anodic oxidation is placed in pH value is 8, handles 3min in the above-mentioned treatment fluid that temperature is 35 DEG C, together
When stirred with magnetic stirrer, revolving speed 1000r/min；
3) aluminium alloy is taken out from treatment fluid, again to dry up after ultrasonic cleaning after rinsing with deionized water.
Embodiment 3:
The aluminum aluminum sulfate seal treatment technique of the aluminium alloy anode oxide film of the embodiment of the present invention 3, specific steps:
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, the hole sealing solution concentration of formation is 5g/L；
2) aluminium alloy after anodic oxidation is placed in pH value is 7, handles 2min in the above-mentioned treatment fluid that temperature is 35 DEG C, together
When stirred with magnetic stirrer, revolving speed 1000r/min；
3) aluminium alloy is taken out from treatment fluid, again to dry up after ultrasonic cleaning after rinsing with deionized water.
Fig. 1 is that whether there is or not the polarization curves for using aluminum aluminum sulfate to carry out sealing pores, as shown in Figure 1, aluminum aluminum sulfate sealing of hole
Afterwards, corrosion electric current density significantly lowers, and the sample corrosion resistance after characterizing sealing of hole is more preferably.
Fig. 2 is that whether there is or not the ac impedance spectroscopy schematic diagrames for using aluminum aluminum sulfate to carry out sealing pores, as shown in Fig. 2, aluminum sulfate
The corrosion resistance of potassium sealing of hole sample is more preferable, matches with the polarization curve conclusion of Fig. 1.
The preferred embodiment of the present invention has been described above in detail, but during present invention is not limited to the embodiments described above
Detail can carry out a variety of equivalents to technical solution of the present invention (in full within the scope of the technical concept of the present invention
Amount, shape, position etc.), these equivalents belong to protection of the invention.
Claims (5)
1. a kind of aluminum aluminum sulfate closing process of aluminium alloy anode oxide film, it is characterised in that: comprising steps of
1) it prepares hole sealing solution: aluminum aluminum sulfate is dissolved in deionized water, form the hole sealing solution that concentration is 1~10.5g/L；
2) aluminium alloy after anodic oxidation is placed in 0.5~10min of processing in above-mentioned hole sealing solution, while uses magnetic stirrer
Stirring, revolving speed 1000r/min；
3) aluminium alloy is taken out from hole sealing solution, again to dry up after ultrasonic cleaning after rinsing with deionized water.
2. the aluminum aluminum sulfate closing process of aluminium alloy anode oxide film according to claim 1, it is characterised in that: in step
3) electro-chemical test and then to obtained aluminium alloy is carried out, specific as follows:
Using three-electrode system, wherein sample to be tested is working electrode, and saturated calomel electrode is reference electrode, and platinum electrode is auxiliary
Electrode；Test solution is 3.5wt.%NaCl solution, and test temperature is 15-25 DEG C；The excitation loaded when AC impedance spectrometry
Signal is sine wave, frequency range 105~10-2Hz, amplitude are ± 10mV；Electric potential scanning range when polarization curve measures
For -0.5V~0.5V, sweep speed 0.5mV/s.
3. the aluminum aluminum sulfate closing process of aluminium alloy anode oxide film according to claim 1, it is characterised in that: the envelope
The concentration of hole solution is 5g/L, and pH value 6, temperature is 50 DEG C.
4. the aluminum aluminum sulfate closing process of aluminium alloy anode oxide film according to claim 1, it is characterised in that: the envelope
The concentration of hole solution is 8g/L, and pH value 8, temperature is 35 DEG C.
5. the aluminum aluminum sulfate closing process of aluminium alloy anode oxide film according to claim 1, it is characterised in that: the envelope
The concentration of hole solution is 5g/L, and pH value 7, temperature is 35 DEG C.
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Citations (9)
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|---|---|---|---|---|
| JPS54104463A (en) * | 1978-02-06 | 1979-08-16 | Ricoh Co Ltd | Surface treating method for aluminum |
| CN1641076A (en) * | 2004-01-15 | 2005-07-20 | 北京化工大学 | Aluminium alloy anode oxide film external-voltage sealing method |
| CN1847139A (en) * | 2005-04-12 | 2006-10-18 | 中国科学院理化技术研究所 | Chemical deposition process of preparing composite nanometer mesoporous silver halide/alumina material |
| CN101096762A (en) * | 2006-06-30 | 2008-01-02 | 佛山市顺德区汉达精密电子科技有限公司 | Magnesium alloy surface hole sealing solution and hole sealing process |
| CN101230478A (en) * | 2007-11-12 | 2008-07-30 | 李文志 | Anodic oxidation and sealing hole washing-free hole sealing technology |
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| CN106997157A (en) * | 2017-06-06 | 2017-08-01 | 长葛市汇达感光材料有限公司 | A kind of method for sealing of photosensitive material plate |
| CN109468510A (en) * | 2018-12-28 | 2019-03-15 | 博盾科技(浙江)有限公司 | A kind of production technology of guardrail aluminium alloy extrusions |
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2019
- 2019-04-04 CN CN201910272313.5A patent/CN109989087A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| JPS54104463A (en) * | 1978-02-06 | 1979-08-16 | Ricoh Co Ltd | Surface treating method for aluminum |
| CN1641076A (en) * | 2004-01-15 | 2005-07-20 | 北京化工大学 | Aluminium alloy anode oxide film external-voltage sealing method |
| CN1847139A (en) * | 2005-04-12 | 2006-10-18 | 中国科学院理化技术研究所 | Chemical deposition process of preparing composite nanometer mesoporous silver halide/alumina material |
| CN101096762A (en) * | 2006-06-30 | 2008-01-02 | 佛山市顺德区汉达精密电子科技有限公司 | Magnesium alloy surface hole sealing solution and hole sealing process |
| CN101230478A (en) * | 2007-11-12 | 2008-07-30 | 李文志 | Anodic oxidation and sealing hole washing-free hole sealing technology |
| CN104789827A (en) * | 2014-05-30 | 2015-07-22 | 安徽鑫发铝业有限公司 | Anti-corrosion aluminum alloy section |
| CN105401199A (en) * | 2015-11-24 | 2016-03-16 | 安徽鑫发铝业有限公司 | Anodic oxidation surface treatment method for aluminum alloy section bar |
| CN106997157A (en) * | 2017-06-06 | 2017-08-01 | 长葛市汇达感光材料有限公司 | A kind of method for sealing of photosensitive material plate |
| CN109468510A (en) * | 2018-12-28 | 2019-03-15 | 博盾科技(浙江)有限公司 | A kind of production technology of guardrail aluminium alloy extrusions |
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Application publication date: 20190709 |