CN1152634A - Aluminium material electrolytic polishing of reversal current method - Google Patents
Aluminium material electrolytic polishing of reversal current method Download PDFInfo
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- CN1152634A CN1152634A CN 96117135 CN96117135A CN1152634A CN 1152634 A CN1152634 A CN 1152634A CN 96117135 CN96117135 CN 96117135 CN 96117135 A CN96117135 A CN 96117135A CN 1152634 A CN1152634 A CN 1152634A
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- reverse current
- electropolishing
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Abstract
The present invention relates to an electropolishing process for aluminium material by using reverse current method. It is characterized by that the reverse current is used as current provided for electrolysis, i.e. the direction of the current is forward-backward alternatively changed, and its conversion frequency is 0.1-10 Hz, in which forward current is 80-90% of one cycle and reverse current is 5-20% of one cycle. Its plating liquor is a dilute solution using soda as main, and its current density is 5-10 amperes per square decimeter, electrolytic polising time is 5-10 min. Said electropolishing process can greatly save energy source, reduce pollution and aluminium consumption, and can greatly reduce polishing cost.
Description
The present invention is a kind of electropolishing method of aluminium, belongs to the especially technical field of aluminium surface working of metal.
Chemical polishing is continued to use in the light processing of aluminium and aluminium alloy always, and promptly the three acid polishing method of sulfuric acid, phosphoric acid, nitric acid not only has serious environmental to pollute, and stainless steel tank is very easily corrosion also, has increased tooling cost.Though the novel method that has multiple reduction to pollute for many years occurs, because of luminance brightness all not as good as three acid polishing, so never obtain general employing.The electropolishing method has appearred again in recent years, i.e. acidic electrolysis polishing method and alkaline dc electrolysis polishing method, and wherein the concentration of acidic electrolysis polishing method acid is big, the temperature height, current density is big, has increased production cost.And the pollution of alkaline dc electrolysis polishing method is less, and (as Japanese patent laid-open 3-13595) can be used for large-sized aluminium polishing, but the big (20 peace/decimetres of its current density
2More than) and temperature height (80 ℃), also to handle through several Dow Chemicals, owing to these reasons, not only be difficult for accomplishing on the technology aborning, and cost is higher, therefore this method also fails to use on the large-sized aluminium of batch process.
Purpose of the present invention just provides that a kind of pollution is little, and strength of solution is low, and service temperature is low, the aluminium electropolishing of the reverse current method that current density is also low.
Technical solution of the present invention is that the electric current employing reverse current of electrolysis effect is that sense of current is that positive and negative checker flows.The frequency of the positive and negative checker of reverse current is 0.1-10 He Zhi, and in each cycle, the shared time of forward current is the 80-95% in whole cycle, and the shared time of reversible circulation is the 5-20% in whole cycle.The current density of reverse current is every square decimeter of 5-10 ampere.The electrolytic time is 5-10 minute.The proportioning of electrolytic solution is a yellow soda ash 50-200 grams per liter, sodium hydroxide 2-30 grams per liter, stablizer 0.1-5 grams per liter.
Its principle is:
Aluminium is when common dc electrolysis polishing, accumulate a large amount of small bubbles on the workpiece (anode), hinder the carrying out of electrolysis leveling, common solution is to strengthen the concentration of polishing fluid, improve temperature and current density and make Workpiece vibration, the leveling effect is proceeded.
And after the present invention adopts reverse current, the steam bubble that produces by the forward current electrolysis, reversible circulation by the time, under the repulsion of negative charge, can rapidly the bubble attached to workpiece surface be repelled, the leveling effect is carried out smoothly.
The invention has the advantages that:
1, owing to adopted reverse current to carry out electropolishing, workpiece surface just can not assembled a large amount of bubbles, so electropolishing just can carry out smoothly, and the while just can be adopted the polishing fluid of low concentration and temperature, reduces current density.
2, owing to reduced the concentration of electrolytic polishing liquid, therefore reduce the consumption of polishing fluid, also reduced follow-up washing workload and water consumption simultaneously, reduced pollution.
3, usually during the larger-size aluminium of electropolishing, the electropolishing groove will be done very greatly, polishing fluid is also very many, it is to need to consume a large amount of energy that polishing fluid in the whole electropolishing groove is heated, because it is low that the present invention has reduced the temperature of polishing fluid, not only simpler on glossing, processing ease, and save a large amount of heating energy source.
4, owing to the reduction greatly of current density, various auxiliary facilitys are also corresponding simple, and electricity consumption significantly reduces, and the polishing cost significantly descends.
5, the aluminium loss is little, and the aluminium loss of general electropolishing method is 3-5%, and the aluminium loss of electropolishing method of the present invention is 1-2%.
Embodiments of the invention are:
On the basis of original Study on Alkaline Electro-Polishing equipment, the power supply of electrolysis polishing changed into can produce positive and negative direction and promptly produce reverse current for the current source of conversion electric current, the frequency of its conversion is 0.1-10 He Zhi, generally adopts 1 He Zhi; Forward current accounts for the 80-95% of a transformation period, generally gets 90%, and reversible circulation accounts for the 5-20% of one-period, generally gets 10%; Voltage of supply is 16 volts, and current density is every square decimeter of 5-10 ampere, generally gets 8 amperes; The proportioning of tank liquor (electrolytic solution) is a yellow soda ash 50-200 grams per liter, generally gets 120 grams per liters; Sodium hydroxide 2-30 grams per liter is generally got 10 grams per liters; Stablizer 0.1-5 grams per liter is generally got 2 grams per liters; The temperature of tank liquor is 35-50 ℃, is generally about 40 ℃, and electrolysis time is 5-10 minute, is generally 6 minutes, and the aluminium after the polishing has mirror effect.Just can realize the present invention according to the above.
Claims (5)
1. the aluminium electropolishing of a reverse current method, it is that sense of current is that positive and negative checker flows that the electric current that it is characterized in that the electrolysis effect adopts reverse current.
2. the aluminium electropolishing of reverse current method according to claim 1, the frequency that it is characterized in that the positive and negative checker of reverse current is 0.1-10 He Zhi, in each cycle, the shared time of forward current is the 80-95% in whole cycle, and the shared time of reversible circulation is the 5-20% in whole cycle.
3. the aluminium electropolishing of reverse current method according to claim 1 and 2, the current density that it is characterized in that reverse current are every square decimeter of 5-10 ampere.
4. the aluminium electropolishing of reverse current method according to claim 3 is characterized in that the electrolytic time is 5-10 minute.
5. the aluminium electropolishing of reverse current method according to claim 3, the proportioning that it is characterized in that electrolytic solution are yellow soda ash 50-200 grams per liter, sodium hydroxide 2-30 grams per liter, stablizer 0.1-5 grams per liter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117135 CN1152634A (en) | 1996-10-17 | 1996-10-17 | Aluminium material electrolytic polishing of reversal current method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117135 CN1152634A (en) | 1996-10-17 | 1996-10-17 | Aluminium material electrolytic polishing of reversal current method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1152634A true CN1152634A (en) | 1997-06-25 |
Family
ID=5124070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117135 Pending CN1152634A (en) | 1996-10-17 | 1996-10-17 | Aluminium material electrolytic polishing of reversal current method |
Country Status (1)
| Country | Link |
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| CN (1) | CN1152634A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090687C (en) * | 1999-06-25 | 2002-09-11 | 四川大学 | Low-pressure anode aluminium foil face-expanding erosion method |
| CN1126830C (en) * | 1999-06-25 | 2003-11-05 | 四川大学 | Medium, high-pressure anode aluminium foil face-expanding erosion method |
| CN1127587C (en) * | 2000-02-01 | 2003-11-12 | 王彦辉 | Technology for electrolytically polishing net of stainless steel wire and its special equipment |
| CN102312275A (en) * | 2011-08-22 | 2012-01-11 | 吴江市精工铝字制造厂 | Aluminium and aluminium-magnesium alloy electrolytic polishing solution |
| CN103122475A (en) * | 2011-11-21 | 2013-05-29 | 比亚迪股份有限公司 | Electrochemical polishing solution for aluminum alloy and electrochemical polishing method of aluminum alloy |
| CN108793054A (en) * | 2018-07-05 | 2018-11-13 | 南京工业职业技术学院 | A kind of micro-nano electrode preparation facilities and preparation method based on bidirectional pulse power supply |
| WO2019237810A1 (en) * | 2018-06-13 | 2019-12-19 | 陈嘉朗 | Metal surface treatment apparatus |
| US11873572B2 (en) | 2019-04-09 | 2024-01-16 | 3DM Biomedical Pty Ltd | Electropolishing method |
-
1996
- 1996-10-17 CN CN 96117135 patent/CN1152634A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090687C (en) * | 1999-06-25 | 2002-09-11 | 四川大学 | Low-pressure anode aluminium foil face-expanding erosion method |
| CN1126830C (en) * | 1999-06-25 | 2003-11-05 | 四川大学 | Medium, high-pressure anode aluminium foil face-expanding erosion method |
| CN1127587C (en) * | 2000-02-01 | 2003-11-12 | 王彦辉 | Technology for electrolytically polishing net of stainless steel wire and its special equipment |
| CN102312275A (en) * | 2011-08-22 | 2012-01-11 | 吴江市精工铝字制造厂 | Aluminium and aluminium-magnesium alloy electrolytic polishing solution |
| CN103122475A (en) * | 2011-11-21 | 2013-05-29 | 比亚迪股份有限公司 | Electrochemical polishing solution for aluminum alloy and electrochemical polishing method of aluminum alloy |
| CN103122475B (en) * | 2011-11-21 | 2015-11-25 | 比亚迪股份有限公司 | A kind of aluminium alloy electric chemical brightening solution and a kind of aluminium alloy electric chemically polishing method |
| WO2019237810A1 (en) * | 2018-06-13 | 2019-12-19 | 陈嘉朗 | Metal surface treatment apparatus |
| CN110592651A (en) * | 2018-06-13 | 2019-12-20 | 陈嘉朗 | Metal surface treatment device |
| CN108793054A (en) * | 2018-07-05 | 2018-11-13 | 南京工业职业技术学院 | A kind of micro-nano electrode preparation facilities and preparation method based on bidirectional pulse power supply |
| CN108793054B (en) * | 2018-07-05 | 2023-11-07 | 南京工业职业技术学院 | Micro-nano electrode preparation device and preparation method based on bidirectional pulse power supply |
| US11873572B2 (en) | 2019-04-09 | 2024-01-16 | 3DM Biomedical Pty Ltd | Electropolishing method |
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