CN105316742A - Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method - Google Patents
Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method Download PDFInfo
- Publication number
- CN105316742A CN105316742A CN201410381219.0A CN201410381219A CN105316742A CN 105316742 A CN105316742 A CN 105316742A CN 201410381219 A CN201410381219 A CN 201410381219A CN 105316742 A CN105316742 A CN 105316742A
- Authority
- CN
- China
- Prior art keywords
- electrolytic solution
- arc oxidation
- aluminum alloy
- differential arc
- citric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides an electrolyte for aluminum alloy micro-arc oxidation to prepare a ceramic coating and a method for conducting surface treatment on the surface of aluminum alloy to obtain the ceramic coating by using the electrolyte. The electrolyte is an aqueous solution of citric acid, potassium hydroxide and sodium tungstate. The electrolyte comprises 10 g-20 g/L of citric acid, 5 g-10 g/L of potassium hydroxide and 1 g-5 g/L of sodium tungstate. Micro-arc oxidation is conducted on the surface of the aluminum alloy through the electrolyte so that the roughness of the surface of the ceramic coating can be effectively decreased; in addition, the time of micro-arc oxidation is shortened, the electric energy loss is reduced, and the cost is reduced.
Description
Technical field
The present invention relates to a kind of electrolytic solution preparing ceramic film for aluminum alloy differential arc oxidation, and utilize this electrolytic solution process aluminum alloy surface to obtain the method for ceramic film.
Background technology
Aluminium alloy is widely used in the fields such as building, traffic, Aeronautics and Astronautics because of premium propertiess such as its quality are light, density is little, specific tenacity is high; On the other hand, because its hardness is low, fusing point is low and the shortcoming such as not wear-resisting, not anti-corrosion then needs to carry out surface modification treatment, to obtain more excellent performance.Differential arc oxidation is that the one of new emergence is in recent years on aluminium alloy and some other valve metals, by the combination of electrolytic solution and corresponding electrical parameter, at the TRANSIENT HIGH TEMPERATURE High Pressure that its surface relies on arc discharge to produce, grow the ceramic film based on substrate metal oxide.This layer of ceramic film under the prerequisite ensureing virgin metal materials'use performance, can be given material surface with property simultaneously, widens its scope of application.
But traditional micro-arc oxidation electrolyte mostly is silicate, borate, aluminate etc., and these electrolytic solution are all in weakly alkaline, prepared ceramic film, the a large amount of electric discharge Minute pores of its remained on surface, obviously presents the vestige of fusing after coagulation, causes rete smooth not around micropore.Chinese patent: electrolytic solution and the treatment process (publication number: CN101333673A of preparing nano ceramics rete for differential arc oxidation, publication date: 2008-12-31) point out, can by adding nano powder thus reducing the micropore caused in discharge process, but required is consuming time longer, need 30 – about 90min, comparatively large to the consume of electric energy like this, cost is higher, is unfavorable for suitability for industrialized production; In addition, ceramic film out prepared by traditional electrolyte is due to the overlong time of differential arc oxidation process, and cause surface comparatively coarse, microhardness distribution is uneven, so further limit again the range of application of Micro-Arc Oxidized Ceramic Coating, thus have impact on it and further promote.
Summary of the invention
For solving above-mentioned deficiency existing in aluminum alloy materials differential arc oxidization technique, the invention provides a kind of electrolytic solution preparing ceramic film for aluminum alloy differential arc oxidation, and utilize this electrolytic solution process aluminum alloy surface to obtain the method for ceramic film.
For reaching goal of the invention, the technical solution adopted in the present invention is:
Configuration electrolytic solution, and join in differential arc oxidation electrolyzer, with agitator, tank liquor is stirred in preparation process, electrolytic solution is distributed more even.
Described electrolytic solution is the aqueous solution of citric acid, potassium hydroxide and sodium wolframate, and electrolytic solution is composed as follows:
Citric acid 10-20g/L
Potassium hydroxide 5-10g/L
Sodium wolframate 1-5g/L
Solvent is deionized water.
Preferably, electrolytic solution is composed as follows:
Citric acid 16g/L
Potassium hydroxide 8g/L
Sodium wolframate 2g/L
Solvent is deionized water.
The invention still further relates to and utilize aforementioned electrolyte to carry out surface-treated method to aluminium alloy, described method comprises: adopt DC pulse micro-arc oxidation device to carry out differential arc oxidation to aluminum alloy surface, aluminium alloy is done anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 30-40A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 8-20min, obtains the aluminium alloy of surface coating ceramic rete.
Preferably, described method is as follows: electrolytic solution consists of: citric acid 16g/L, potassium hydroxide 8g/L, sodium wolframate 2g/L, and solvent is deionized water; Adopt 20kW DC pulse micro-arc oxidation device to carry out differential arc oxidation to aluminum alloy surface, aluminium alloy is done anode leaching in the electrolytic solution, the stainless steel vessel of band cooling system is as negative electrode, and control current density is 30-40A/dm
2left and right, constantly stirring the lower constant current differential arc oxidation time is about 8-20min, obtains the aluminium alloy of surface coating ceramic rete.
Beneficial effect of the present invention is: (1) traditional micro-arc oxidation electrolyte many employings silicate, borate or aluminates system, these systems are all weakly alkaline, and the citric acid systems adopted in the present invention is slightly acidic, with this system do electrolytic solution prepare ceramic film time, the required differential arc oxidation time is shorter, electric energy loss reduces, cost-saving; (2) citric acid systems of the present invention, its weakly acidic ionogen can facilitate aluminum alloy surface homogeneous film formation, thus makes formed ceramic film smooth surface, and roughness is less; (3) the present invention is to the material, shape, size etc. of aluminium alloy without particular requirement, has good versatility, and simply effective, environmental protection.
Embodiment
Below in conjunction with concrete mode, the present invention is described further, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to scope.
Embodiment 1
Preparation of raw material: citric acid 20g, potassium hydroxide 17g, sodium wolframate 4g, deionized water 2L, aluminum alloy specimen.
Prepared by material: by above-mentioned composition, citric acid, potassium hydroxide and sodium wolframate are added in deionized water and be made into electrolytic solution, join in differential arc oxidation electrolyzer, and stir it.
20kW DC pulse micro-arc oxidation device is adopted to carry out differential arc oxidation to aluminum alloy surface, technical process is: sand papering, oil removing, deionized water, rinsing, differential arc oxidation, tap water rinse, seasoning, electrolytic solution is the analytically pure aqueous solution, sample does anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 30A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 8min, and the surface ceramii layer obtained is smooth, and roughness is little.
Embodiment 2
Preparation of raw material: citric acid 24g, potassium hydroxide 15g, sodium wolframate 4g, deionized water 2L, aluminum alloy specimen.
Prepared by material: by above-mentioned composition, citric acid, potassium hydroxide and sodium wolframate are added in deionized water and be made into electrolytic solution, join in differential arc oxidation electrolyzer, and stir it.
20kW DC pulse micro-arc oxidation device is adopted to carry out differential arc oxidation to aluminum alloy surface, technical process is: sand papering, oil removing, deionized water, rinsing, differential arc oxidation, tap water rinse, seasoning, electrolytic solution is the analytically pure aqueous solution, sample does anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 35A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 12min, and the surface ceramii layer obtained is smooth, and roughness is little.
Embodiment 3
Preparation of raw material: citric acid 28g, potassium hydroxide 17g, sodium wolframate 4g, deionized water 2L, aluminum alloy specimen.
Prepared by material: by above-mentioned composition, citric acid, potassium hydroxide and sodium wolframate are added in deionized water and be made into electrolytic solution, join in differential arc oxidation electrolyzer, and stir it.
20kW DC pulse micro-arc oxidation device is adopted to carry out differential arc oxidation to aluminum alloy surface, technical process is: sand papering, oil removing, deionized water, rinsing, differential arc oxidation, tap water rinse, seasoning, electrolytic solution is the analytically pure aqueous solution, sample does anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 38A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 15min, and the surface ceramii layer obtained is smooth, and roughness is little.
Embodiment 4
Preparation of raw material: citric acid 32g, potassium hydroxide 16g, sodium wolframate 4g, deionized water 2L, aluminum alloy specimen.
Prepared by material: by above-mentioned composition, citric acid, potassium hydroxide and sodium wolframate are added in deionized water and be made into electrolytic solution, join in differential arc oxidation electrolyzer, and stir it.
20kW DC pulse micro-arc oxidation device is adopted to carry out differential arc oxidation to aluminum alloy surface, technical process is: sand papering, oil removing, deionized water, rinsing, differential arc oxidation, tap water rinse, seasoning, electrolytic solution is the analytically pure aqueous solution, sample does anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 40A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 20min, and the surface ceramii layer obtained is smooth, and roughness is little.
Adopt the microhardness of HMV-IT microhardness tester test sample, the microhardness value at the sample difference place that table 1 is prepared for embodiment 1-4:
Table 1
| Embodiment | Microhardness (HV 0.2） |
| 1 | 1015,1098,1236,1132 |
| 2 | 1146,1178,1325,1266 |
| 3 | 1225,1478,1578,1624 |
| 4 | 1645,1732,1978,1866 |
As shown in Table 1, the ceramic layer microhardness value change that the inventive method obtains is less, is distributed between 1000 to 2000, is evenly distributed.
Claims (5)
1. prepare an electrolytic solution for ceramic film for aluminum alloy differential arc oxidation, it is characterized in that described electrolytic solution is the aqueous solution of citric acid, potassium hydroxide and sodium wolframate.
2. electrolytic solution according to claim 1, is characterized in that described electrolytic solution is composed as follows:
Citric acid 10-20g/L
Potassium hydroxide 5-10g/L
Sodium wolframate 1-5g/L
Solvent is deionized water.
3. electrolytic solution according to claim 2, is characterized in that described electrolytic solution is composed as follows:
Citric acid 16g/L
Potassium hydroxide 8g/L
Sodium wolframate 2g/L
Solvent is deionized water.
4. the electrolytic solution according to claim arbitrary in claim 1-3, surface-treated method is carried out to aluminium alloy, described method comprises: adopt DC pulse micro-arc oxidation device to carry out differential arc oxidation to aluminum alloy surface, aluminium alloy is done anode leaching in the electrolytic solution, stainless steel vessel with cooling system is as negative electrode, and control current density is 30-40A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 8-20min, obtains the aluminium alloy of surface coating ceramic rete.
5. electrolytic solution according to claim 3, carries out surface-treated method to aluminium alloy, and described method is as follows: electrolytic solution consists of: citric acid 16g/L, potassium hydroxide 8g/L, sodium wolframate 2g/L, and solvent is deionized water; Adopt 20kW DC pulse micro-arc oxidation device to carry out differential arc oxidation to aluminum alloy surface, aluminium alloy is done anode leaching in the electrolytic solution, the stainless steel vessel of band cooling system is as negative electrode, and control current density is 30-40A/dm
2, constantly stirring the lower constant current differential arc oxidation time is 8-20min, obtains the aluminium alloy of surface coating ceramic rete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381219.0A CN105316742A (en) | 2014-08-05 | 2014-08-05 | Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381219.0A CN105316742A (en) | 2014-08-05 | 2014-08-05 | Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105316742A true CN105316742A (en) | 2016-02-10 |
Family
ID=55245023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410381219.0A Pending CN105316742A (en) | 2014-08-05 | 2014-08-05 | Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105316742A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566409A (en) * | 2003-06-25 | 2005-01-19 | 王振波 | Method for plasma electrolytic oxidation preparation of ceramic oxide film and its products |
| CN101307477A (en) * | 2008-01-25 | 2008-11-19 | 哈尔滨工业大学 | Method for preparing high-wear-resistant antifriction self-lubricating composite membrane layer on surface of aluminum alloy |
| US20140110263A1 (en) * | 2012-10-19 | 2014-04-24 | University Of Pittsburgh | Superhydrophobic Anodized Metals and Method of Making Same |
-
2014
- 2014-08-05 CN CN201410381219.0A patent/CN105316742A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566409A (en) * | 2003-06-25 | 2005-01-19 | 王振波 | Method for plasma electrolytic oxidation preparation of ceramic oxide film and its products |
| CN101307477A (en) * | 2008-01-25 | 2008-11-19 | 哈尔滨工业大学 | Method for preparing high-wear-resistant antifriction self-lubricating composite membrane layer on surface of aluminum alloy |
| US20140110263A1 (en) * | 2012-10-19 | 2014-04-24 | University Of Pittsburgh | Superhydrophobic Anodized Metals and Method of Making Same |
Non-Patent Citations (5)
| Title |
|---|
| J.JOVOVIC等: ""spectroscopic characterization of plasma during electrolytic oxidation(PEO) of aluminium"", 《SURFACE & COATINGS TECHNOLOGY》 * |
| 中国机械工程学会热处理学会: "《热处理手册》", 31 October 2013, 机械工业出版社 * |
| 单德忠: "《机械装备工业节能减排制造技术》", 30 June 2014, 机械工业出版社 * |
| 王虹斌等: "《微弧氧化技术及其在海洋环境中的应用》", 30 September 2010, 国防工业出版社 * |
| 郝建民等: ""弱酸性介质中铝合金微弧氧化研究"", 《轻合金加工技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102260891B (en) | Method for electrodepositing nanocrystalline nickel-cobalt alloy by double-pulse | |
| CN102428213B (en) | Method for treating the surface of a metal | |
| TWI418664B (en) | Surface processing method on valve metal using plasma electrolytic oxidation | |
| CN106400079A (en) | Preparation method of multiple super-hydrophobic composite film layers on aluminium alloy surface | |
| CN109056023A (en) | Sulfuric acid+oxalic acid nitration mixture anode oxidation process | |
| CN105297082A (en) | Method for preparing super-hydrophobic film layers on metal surfaces through one-step method | |
| CN103469267A (en) | Process method for carrying out surface treatment on electrolysis copper foil, and cooper foil treated by using the same | |
| CN105040071A (en) | Micro-arc oxidation electrolyte and magnesium alloy surface treatment method with same | |
| CN101333673B (en) | Electrolytic solution for preparing nano ceramic coatings by micro-arc oxidation | |
| CN102703955A (en) | Method for coating film on magnesium alloy plate by microarc oxidation | |
| DE10297114B4 (en) | Method for anodizing magnesium and electrolytic solution | |
| CN103757667A (en) | Chrome plating additive and electroplating liquid thereof | |
| CN103397365A (en) | Electrolyte suitable for preparing ceramic membrane by micro-arc oxidation of aluminium and aluminium alloy | |
| CN106835234B (en) | For the electrolyte of differential arc oxidation, differential arc oxidation method and aluminum or aluminum alloy material | |
| CN110760906B (en) | Nano zinc-cobalt alloy coating based on double-pulse electrodeposition and preparation method thereof | |
| CN105316741A (en) | Method for conducting surface micro-arc oxidation treatment on aluminum alloy by adopting grading electric currents | |
| Zhan et al. | Effects of nickel additive on micro-arc oxidation coating of AZ63B magnesium alloy | |
| CN103540975B (en) | A kind of method at copper electroplating surface metal manganese | |
| CN106702464A (en) | Electrolyte for preparing black ceramic film layer through micro-arc oxidation for magnesium alloy, and method | |
| CN102312274A (en) | Non-chrome electrolytic polishing solution for magnesium aluminum alloy | |
| CN105316742A (en) | Electrolyte for aluminum alloy micro-arc oxidation to prepare ceramic coating and treatment method | |
| CN106086980B (en) | The preparation method of best bright finish coating on a kind of alloy matrix aluminum | |
| CN101435081B (en) | No-voltage chemical membrane preparing and low voltage electrochemical membrane preparing combined process for magnesium alloy surface | |
| KR20040094105A (en) | Electrolyte solution for anodizing and corrosion-resisting coating method of magnesium alloy using the same | |
| TW202229003A (en) | Stainless steel material structure and its surface manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160210 |